./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/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_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/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_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:11:21,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:11:21,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:11:21,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:11:21,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:11:21,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:11:21,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:11:21,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:11:21,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:11:21,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:11:21,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:11:21,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:11:21,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:11:21,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:11:21,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:11:21,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:11:21,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:11:21,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:11:21,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:11:21,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:11:21,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:11:21,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:11:21,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:11:21,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:11:21,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:11:21,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:11:21,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:11:21,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:11:21,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:11:21,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:11:21,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:11:21,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:11:21,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:11:21,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:11:21,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:11:21,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:11:21,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:11:21,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:11:21,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:11:21,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:11:21,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:11:21,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:11:21,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:11:21,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:11:21,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:11:21,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:11:21,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:11:21,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:11:21,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:11:21,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:11:21,240 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:11:21,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:11:21,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:11:21,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:11:21,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:11:21,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:11:21,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:11:21,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:11:21,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:11:21,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:11:21,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:11:21,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:11:21,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:11:21,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:11:21,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:11:21,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:11:21,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:11:21,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:11:21,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:11:21,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:11:21,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:11:21,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:11:21,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:11:21,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:11:21,246 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:11:21,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:11:21,246 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_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-11-25 18:11:21,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:11:21,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:11:21,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:11:21,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:11:21,608 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:11:21,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-25 18:11:24,740 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:11:25,028 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:11:25,029 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-25 18:11:25,037 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/data/7ebd3fa6e/3fd56fe36bba4097a05ba4e68d3c896d/FLAGf486b1f1b [2022-11-25 18:11:25,057 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/data/7ebd3fa6e/3fd56fe36bba4097a05ba4e68d3c896d [2022-11-25 18:11:25,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:11:25,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:11:25,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:11:25,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:11:25,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:11:25,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3eb306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25, skipping insertion in model container [2022-11-25 18:11:25,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:11:25,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:11:25,320 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_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-25 18:11:25,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:11:25,339 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:11:25,361 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_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-25 18:11:25,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:11:25,378 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:11:25,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25 WrapperNode [2022-11-25 18:11:25,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:11:25,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:11:25,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:11:25,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:11:25,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,414 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-25 18:11:25,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:11:25,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:11:25,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:11:25,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:11:25,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:11:25,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:11:25,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:11:25,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:11:25,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (1/1) ... [2022-11-25 18:11:25,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:11:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:25,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:11:25,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:11:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:11:25,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:11:25,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:11:25,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:11:25,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:11:25,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:11:25,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:11:25,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:11:25,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:11:25,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:11:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:11:25,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:11:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:11:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:11:25,560 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:11:25,678 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:11:25,681 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:11:26,015 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:11:26,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:11:26,025 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:11:26,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:26 BoogieIcfgContainer [2022-11-25 18:11:26,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:11:26,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:11:26,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:11:26,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:11:26,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:11:25" (1/3) ... [2022-11-25 18:11:26,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3333de6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:26, skipping insertion in model container [2022-11-25 18:11:26,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:25" (2/3) ... [2022-11-25 18:11:26,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3333de6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:26, skipping insertion in model container [2022-11-25 18:11:26,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:26" (3/3) ... [2022-11-25 18:11:26,038 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-11-25 18:11:26,049 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:11:26,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:11:26,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:11:26,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:11:26,167 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:11:26,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-11-25 18:11:26,320 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-11-25 18:11:26,327 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:11:26,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-11-25 18:11:26,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-11-25 18:11:26,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-11-25 18:11:26,349 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:11:26,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 93 transitions, 204 flow [2022-11-25 18:11:26,383 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 93 transitions, 204 flow [2022-11-25 18:11:26,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 93 transitions, 204 flow [2022-11-25 18:11:26,421 INFO L130 PetriNetUnfolder]: 7/93 cut-off events. [2022-11-25 18:11:26,422 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:11:26,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 7/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-11-25 18:11:26,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-11-25 18:11:29,878 INFO L134 LiptonReduction]: Checked pairs total: 1314 [2022-11-25 18:11:29,878 INFO L136 LiptonReduction]: Total number of compositions: 79 [2022-11-25 18:11:29,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:11:29,925 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;@3a0cd11d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:11:29,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:11:29,948 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-11-25 18:11:29,949 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:11:29,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:29,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:29,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:11:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1956450245, now seen corresponding path program 1 times [2022-11-25 18:11:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:29,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65111956] [2022-11-25 18:11:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65111956] [2022-11-25 18:11:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65111956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:30,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:30,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608888244] [2022-11-25 18:11:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:30,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 186 [2022-11-25 18:11:30,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:30,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:30,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 186 [2022-11-25 18:11:30,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:31,018 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-11-25 18:11:31,018 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-25 18:11:31,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1606 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-11-25 18:11:31,025 INFO L137 encePairwiseOnDemand]: 181/186 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-11-25 18:11:31,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2022-11-25 18:11:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-11-25 18:11:31,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2022-11-25 18:11:31,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-11-25 18:11:31,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-11-25 18:11:31,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:31,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-11-25 18:11:31,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 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 18:11:31,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:31,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:31,066 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 315 transitions. [2022-11-25 18:11:31,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2022-11-25 18:11:31,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:11:31,072 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2022-11-25 18:11:31,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-11-25 18:11:31,079 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-11-25 18:11:31,079 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2022-11-25 18:11:31,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:31,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:31,080 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:31,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:11:31,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:11:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2005536576, now seen corresponding path program 1 times [2022-11-25 18:11:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:31,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077889472] [2022-11-25 18:11:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:31,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:31,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:31,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077889472] [2022-11-25 18:11:31,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077889472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:31,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:31,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:11:31,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548756301] [2022-11-25 18:11:31,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:31,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:11:31,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:31,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:11:31,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:11:31,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 186 [2022-11-25 18:11:31,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:31,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:31,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 186 [2022-11-25 18:11:31,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:32,054 INFO L130 PetriNetUnfolder]: 596/906 cut-off events. [2022-11-25 18:11:32,055 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-11-25 18:11:32,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 906 events. 596/906 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3370 event pairs, 166 based on Foata normal form. 6/912 useless extension candidates. Maximal degree in co-relation 627. Up to 420 conditions per place. [2022-11-25 18:11:32,065 INFO L137 encePairwiseOnDemand]: 178/186 looper letters, 69 selfloop transitions, 8 changer transitions 8/85 dead transitions. [2022-11-25 18:11:32,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 85 transitions, 416 flow [2022-11-25 18:11:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:11:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:11:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-11-25 18:11:32,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.500768049155146 [2022-11-25 18:11:32,074 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-11-25 18:11:32,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-11-25 18:11:32,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:32,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-11-25 18:11:32,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,084 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 7 states and 652 transitions. [2022-11-25 18:11:32,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 85 transitions, 416 flow [2022-11-25 18:11:32,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 85 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:32,089 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 139 flow [2022-11-25 18:11:32,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-11-25 18:11:32,091 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-11-25 18:11:32,091 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 139 flow [2022-11-25 18:11:32,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:32,093 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:32,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:11:32,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:11:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash -956107130, now seen corresponding path program 2 times [2022-11-25 18:11:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371798059] [2022-11-25 18:11:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:32,455 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 18:11:32,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371798059] [2022-11-25 18:11:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371798059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484837601] [2022-11-25 18:11:32,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:11:32,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:32,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:32,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:32,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:11:32,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:11:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:32,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:11:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:32,982 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 18:11:32,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:33,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484837601] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:33,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:11:33,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2022-11-25 18:11:33,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067766653] [2022-11-25 18:11:33,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:33,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:11:33,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:11:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:11:33,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-25 18:11:33,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:33,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:33,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-25 18:11:33,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:33,931 INFO L130 PetriNetUnfolder]: 832/1268 cut-off events. [2022-11-25 18:11:33,931 INFO L131 PetriNetUnfolder]: For 1525/1579 co-relation queries the response was YES. [2022-11-25 18:11:33,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 1268 events. 832/1268 cut-off events. For 1525/1579 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5330 event pairs, 172 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 1710. Up to 409 conditions per place. [2022-11-25 18:11:33,944 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 99 selfloop transitions, 17 changer transitions 1/118 dead transitions. [2022-11-25 18:11:33,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 118 transitions, 705 flow [2022-11-25 18:11:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:11:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:11:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-11-25 18:11:33,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5221774193548387 [2022-11-25 18:11:33,948 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-11-25 18:11:33,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-11-25 18:11:33,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:33,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-11-25 18:11:33,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:33,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:33,957 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:33,957 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 139 flow. Second operand 8 states and 777 transitions. [2022-11-25 18:11:33,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 118 transitions, 705 flow [2022-11-25 18:11:33,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 118 transitions, 675 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:33,969 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 294 flow [2022-11-25 18:11:33,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2022-11-25 18:11:33,971 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-11-25 18:11:33,972 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 294 flow [2022-11-25 18:11:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:33,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:33,973 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:33,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:34,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:34,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:11:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2040322026, now seen corresponding path program 1 times [2022-11-25 18:11:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:34,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573398130] [2022-11-25 18:11:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:34,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:34,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:34,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573398130] [2022-11-25 18:11:34,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573398130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:34,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:11:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612426598] [2022-11-25 18:11:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:11:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:34,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:11:34,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:11:34,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-25 18:11:34,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:34,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:34,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-25 18:11:34,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:35,324 INFO L130 PetriNetUnfolder]: 1078/1660 cut-off events. [2022-11-25 18:11:35,324 INFO L131 PetriNetUnfolder]: For 4626/4626 co-relation queries the response was YES. [2022-11-25 18:11:35,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 1660 events. 1078/1660 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7320 event pairs, 336 based on Foata normal form. 10/1670 useless extension candidates. Maximal degree in co-relation 4790. Up to 894 conditions per place. [2022-11-25 18:11:35,343 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 99 selfloop transitions, 13 changer transitions 13/125 dead transitions. [2022-11-25 18:11:35,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 125 transitions, 940 flow [2022-11-25 18:11:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:11:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:11:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-11-25 18:11:35,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.500768049155146 [2022-11-25 18:11:35,347 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-11-25 18:11:35,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-11-25 18:11:35,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:35,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-11-25 18:11:35,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:35,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:35,355 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:35,355 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 294 flow. Second operand 7 states and 652 transitions. [2022-11-25 18:11:35,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 125 transitions, 940 flow [2022-11-25 18:11:35,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 125 transitions, 936 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 18:11:35,379 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 426 flow [2022-11-25 18:11:35,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-11-25 18:11:35,381 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-11-25 18:11:35,382 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 426 flow [2022-11-25 18:11:35,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:35,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:35,383 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:11:35,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:11:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:35,385 INFO L85 PathProgramCache]: Analyzing trace with hash -591048364, now seen corresponding path program 3 times [2022-11-25 18:11:35,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:35,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287719136] [2022-11-25 18:11:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:35,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:35,720 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 18:11:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287719136] [2022-11-25 18:11:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287719136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360118426] [2022-11-25 18:11:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:11:35,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:35,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:35,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:35,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:11:35,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:11:35,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:11:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:36,040 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 18:11:36,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:40,751 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 18:11:40,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360118426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:11:40,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:11:40,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-11-25 18:11:40,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118055925] [2022-11-25 18:11:40,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:11:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:11:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:11:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=170, Unknown=2, NotChecked=0, Total=240 [2022-11-25 18:11:41,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 186 [2022-11-25 18:11:41,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 426 flow. Second operand has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:41,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:41,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 186 [2022-11-25 18:11:41,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:46,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:11:48,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:11:50,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:11:52,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:11:54,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:11:56,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:11:58,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:00,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:02,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:04,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:06,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:08,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:10,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:13,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:15,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:17,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:36,070 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (< .cse4 (mod c_~a~0 4294967296)) (let ((.cse5 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse5 .cse2) 4294967296) 4294967296) .cse3) .cse5))) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse6 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse4) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse6) (let ((.cse7 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse7 .cse2) 4294967296) 4294967296) .cse3) .cse7)) (< .cse6 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-25 18:12:40,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:23,601 WARN L233 SmtUtils]: Spent 12.19s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:13:27,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:35,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:38,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:40,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:46,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:48,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:50,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:52,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:54,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:56,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:59,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:01,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:03,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:05,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:07,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:09,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:11,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:13,438 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (< .cse2 (mod (+ c_~b~0 c_~a~0) 4294967296)) (let ((.cse4 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse4 .cse2) 4294967296) 4294967296) .cse3) .cse4)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse5 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse5) (let ((.cse6 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse6 .cse2) 4294967296) 4294967296) .cse3) .cse6)) (< .cse5 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-25 18:14:15,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:17,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:19,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:21,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:23,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:25,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:27,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:29,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:31,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:33,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:35,796 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse2 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (< .cse0 (mod (+ c_~b~0 c_~a~0) 4294967296)) (= c_thread2Thread1of1ForFork2_~i~1 0) (let ((.cse1 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse1 .cse0) 4294967296) 4294967296) .cse2) .cse1)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse3 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse3) (let ((.cse4 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse4 .cse0) 4294967296) 4294967296) .cse2) .cse4)) (< .cse3 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-25 18:14:37,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:39,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:41,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:43,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:45,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:47,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:49,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:56,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:14:58,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:00,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:02,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:04,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:06,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:08,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:11,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:13,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:15,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:17,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:19,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:21,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:23,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:25,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:27,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:29,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:31,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:33,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:33,741 INFO L130 PetriNetUnfolder]: 2456/3829 cut-off events. [2022-11-25 18:15:33,742 INFO L131 PetriNetUnfolder]: For 14995/14995 co-relation queries the response was YES. [2022-11-25 18:15:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16427 conditions, 3829 events. 2456/3829 cut-off events. For 14995/14995 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20219 event pairs, 355 based on Foata normal form. 52/3881 useless extension candidates. Maximal degree in co-relation 11588. Up to 1322 conditions per place. [2022-11-25 18:15:33,777 INFO L137 encePairwiseOnDemand]: 173/186 looper letters, 223 selfloop transitions, 113 changer transitions 3/339 dead transitions. [2022-11-25 18:15:33,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 339 transitions, 2667 flow [2022-11-25 18:15:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:15:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:15:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2442 transitions. [2022-11-25 18:15:33,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4862604540023895 [2022-11-25 18:15:33,785 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2442 transitions. [2022-11-25 18:15:33,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2442 transitions. [2022-11-25 18:15:33,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:33,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2442 transitions. [2022-11-25 18:15:33,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 90.44444444444444) internal successors, (2442), 27 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:33,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:33,801 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:33,802 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 426 flow. Second operand 27 states and 2442 transitions. [2022-11-25 18:15:33,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 339 transitions, 2667 flow [2022-11-25 18:15:33,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 339 transitions, 2610 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:33,844 INFO L231 Difference]: Finished difference. Result has 105 places, 156 transitions, 1729 flow [2022-11-25 18:15:33,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1729, PETRI_PLACES=105, PETRI_TRANSITIONS=156} [2022-11-25 18:15:33,846 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2022-11-25 18:15:33,846 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 156 transitions, 1729 flow [2022-11-25 18:15:33,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:33,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:33,847 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:33,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:34,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:34,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:15:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1894352720, now seen corresponding path program 4 times [2022-11-25 18:15:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446909285] [2022-11-25 18:15:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:34,314 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 18:15:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446909285] [2022-11-25 18:15:34,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446909285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808907218] [2022-11-25 18:15:34,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:15:34,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:34,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:34,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:15:34,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:15:34,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:15:34,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:34,536 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 18:15:34,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:34,668 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 18:15:34,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808907218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:34,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:34,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2022-11-25 18:15:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557616453] [2022-11-25 18:15:34,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:15:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:15:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:15:34,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-25 18:15:34,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 156 transitions, 1729 flow. Second operand has 10 states, 10 states have (on average 84.2) internal successors, (842), 10 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:34,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:34,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-25 18:15:34,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:36,750 INFO L130 PetriNetUnfolder]: 3506/5509 cut-off events. [2022-11-25 18:15:36,751 INFO L131 PetriNetUnfolder]: For 82027/82027 co-relation queries the response was YES. [2022-11-25 18:15:36,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38511 conditions, 5509 events. 3506/5509 cut-off events. For 82027/82027 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31504 event pairs, 416 based on Foata normal form. 18/5527 useless extension candidates. Maximal degree in co-relation 34456. Up to 2013 conditions per place. [2022-11-25 18:15:36,827 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 296 selfloop transitions, 113 changer transitions 4/413 dead transitions. [2022-11-25 18:15:36,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 413 transitions, 5135 flow [2022-11-25 18:15:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:15:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:15:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1505 transitions. [2022-11-25 18:15:36,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5057123655913979 [2022-11-25 18:15:36,833 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1505 transitions. [2022-11-25 18:15:36,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1505 transitions. [2022-11-25 18:15:36,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:36,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1505 transitions. [2022-11-25 18:15:36,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.0625) internal successors, (1505), 16 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:36,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:36,845 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:36,845 INFO L175 Difference]: Start difference. First operand has 105 places, 156 transitions, 1729 flow. Second operand 16 states and 1505 transitions. [2022-11-25 18:15:36,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 413 transitions, 5135 flow [2022-11-25 18:15:37,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 413 transitions, 4785 flow, removed 175 selfloop flow, removed 0 redundant places. [2022-11-25 18:15:37,164 INFO L231 Difference]: Finished difference. Result has 129 places, 219 transitions, 2667 flow [2022-11-25 18:15:37,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2667, PETRI_PLACES=129, PETRI_TRANSITIONS=219} [2022-11-25 18:15:37,169 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2022-11-25 18:15:37,170 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 219 transitions, 2667 flow [2022-11-25 18:15:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.2) internal successors, (842), 10 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:37,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:37,171 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:37,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 18:15:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:37,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:15:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1039299616, now seen corresponding path program 5 times [2022-11-25 18:15:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630392820] [2022-11-25 18:15:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:37,667 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 18:15:37,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630392820] [2022-11-25 18:15:37,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630392820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426872020] [2022-11-25 18:15:37,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:15:37,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:37,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:37,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:37,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:15:37,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:15:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:38,074 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 18:15:38,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:38,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426872020] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:38,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:15:38,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2022-11-25 18:15:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021569398] [2022-11-25 18:15:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:38,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:15:38,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:38,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:15:38,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:15:38,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-25 18:15:38,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 219 transitions, 2667 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:38,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:38,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-25 18:15:38,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:40,157 INFO L130 PetriNetUnfolder]: 4114/6474 cut-off events. [2022-11-25 18:15:40,157 INFO L131 PetriNetUnfolder]: For 120435/120617 co-relation queries the response was YES. [2022-11-25 18:15:40,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49102 conditions, 6474 events. 4114/6474 cut-off events. For 120435/120617 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 38603 event pairs, 1004 based on Foata normal form. 44/6474 useless extension candidates. Maximal degree in co-relation 44664. Up to 2638 conditions per place. [2022-11-25 18:15:40,242 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 238 selfloop transitions, 106 changer transitions 1/351 dead transitions. [2022-11-25 18:15:40,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 351 transitions, 4891 flow [2022-11-25 18:15:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:15:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:15:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-11-25 18:15:40,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5221774193548387 [2022-11-25 18:15:40,246 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-11-25 18:15:40,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-11-25 18:15:40,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:40,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-11-25 18:15:40,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,254 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,254 INFO L175 Difference]: Start difference. First operand has 129 places, 219 transitions, 2667 flow. Second operand 8 states and 777 transitions. [2022-11-25 18:15:40,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 351 transitions, 4891 flow [2022-11-25 18:15:40,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 351 transitions, 4695 flow, removed 89 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:40,836 INFO L231 Difference]: Finished difference. Result has 141 places, 253 transitions, 3460 flow [2022-11-25 18:15:40,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3460, PETRI_PLACES=141, PETRI_TRANSITIONS=253} [2022-11-25 18:15:40,837 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2022-11-25 18:15:40,837 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 253 transitions, 3460 flow [2022-11-25 18:15:40,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:40,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:40,838 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:40,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:41,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:41,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:15:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash -827052692, now seen corresponding path program 6 times [2022-11-25 18:15:41,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342363198] [2022-11-25 18:15:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:41,313 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 18:15:41,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:41,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342363198] [2022-11-25 18:15:41,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342363198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777569316] [2022-11-25 18:15:41,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:15:41,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:41,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:41,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:41,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:15:41,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:15:41,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:15:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:41,581 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 18:15:41,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:46,103 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 18:15:46,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777569316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:46,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:46,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2022-11-25 18:15:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124149225] [2022-11-25 18:15:46,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:15:46,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:15:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2022-11-25 18:15:48,130 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 [1] [2022-11-25 18:15:50,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:50,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 186 [2022-11-25 18:15:50,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 253 transitions, 3460 flow. Second operand has 12 states, 12 states have (on average 82.08333333333333) internal successors, (985), 12 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:50,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:50,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 186 [2022-11-25 18:15:50,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:52,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:54,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:56,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:15:58,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:00,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:03,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:05,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:07,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:09,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:11,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:13,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:16,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:18,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:16:20,174 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 [1] [2022-11-25 18:16:22,229 WARN L837 $PredicateComparison]: unable to prove that (and (<= (div (+ c_~b~0 c_~a~0) 4294967296) (div (+ (- 1) c_~b~0 c_~a~0) 4294967296)) (forall ((aux_mod_~b~0_21 Int)) (or (> 0 aux_mod_~b~0_21) (let ((.cse0 (* 4294967295 aux_mod_~b~0_21))) (< .cse0 (+ (mod c_thread1Thread1of1ForFork1_~i~0 4294967296) (* (div .cse0 4294967296) 4294967296) 1))) (< (mod c_thread2Thread1of1ForFork2_~i~1 4294967296) aux_mod_~b~0_21)))) is different from false [2022-11-25 18:16:25,025 INFO L130 PetriNetUnfolder]: 6897/11037 cut-off events. [2022-11-25 18:16:25,026 INFO L131 PetriNetUnfolder]: For 229491/229491 co-relation queries the response was YES. [2022-11-25 18:16:25,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87515 conditions, 11037 events. 6897/11037 cut-off events. For 229491/229491 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 73945 event pairs, 1443 based on Foata normal form. 36/11073 useless extension candidates. Maximal degree in co-relation 85820. Up to 5474 conditions per place. [2022-11-25 18:16:25,276 INFO L137 encePairwiseOnDemand]: 174/186 looper letters, 339 selfloop transitions, 253 changer transitions 3/595 dead transitions. [2022-11-25 18:16:25,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 595 transitions, 9213 flow [2022-11-25 18:16:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:16:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:16:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1465 transitions. [2022-11-25 18:16:25,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49227150537634407 [2022-11-25 18:16:25,283 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1465 transitions. [2022-11-25 18:16:25,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1465 transitions. [2022-11-25 18:16:25,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:25,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1465 transitions. [2022-11-25 18:16:25,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 91.5625) internal successors, (1465), 16 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:25,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:25,293 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:25,294 INFO L175 Difference]: Start difference. First operand has 141 places, 253 transitions, 3460 flow. Second operand 16 states and 1465 transitions. [2022-11-25 18:16:25,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 595 transitions, 9213 flow [2022-11-25 18:16:26,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 595 transitions, 9159 flow, removed 27 selfloop flow, removed 0 redundant places. [2022-11-25 18:16:26,384 INFO L231 Difference]: Finished difference. Result has 170 places, 427 transitions, 7434 flow [2022-11-25 18:16:26,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7434, PETRI_PLACES=170, PETRI_TRANSITIONS=427} [2022-11-25 18:16:26,385 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 141 predicate places. [2022-11-25 18:16:26,385 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 427 transitions, 7434 flow [2022-11-25 18:16:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.08333333333333) internal successors, (985), 12 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:26,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:26,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:26,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:26,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:16:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2079261198, now seen corresponding path program 7 times [2022-11-25 18:16:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781581911] [2022-11-25 18:16:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:26,813 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 18:16:26,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:26,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781581911] [2022-11-25 18:16:26,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781581911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:26,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028532657] [2022-11-25 18:16:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:16:26,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:26,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:26,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:26,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:16:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:16:26,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:27,030 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 18:16:27,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:29,332 WARN L837 $PredicateComparison]: unable to prove that (forall ((aux_mod_~a~0_21 Int)) (or (>= aux_mod_~a~0_21 4294967296) (<= aux_mod_~a~0_21 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (let ((.cse0 (* 4294967295 aux_mod_~a~0_21))) (< (+ (* 4294967296 (div .cse0 4294967296)) (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) .cse0)))) is different from false [2022-11-25 18:16:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 18:16:29,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028532657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:29,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:29,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 18:16:29,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52998225] [2022-11-25 18:16:29,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:29,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:16:29,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:29,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:16:29,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2022-11-25 18:16:29,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 186 [2022-11-25 18:16:29,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 427 transitions, 7434 flow. Second operand has 13 states, 13 states have (on average 79.3076923076923) internal successors, (1031), 13 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:29,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:29,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 186 [2022-11-25 18:16:29,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:33,069 INFO L130 PetriNetUnfolder]: 7496/12006 cut-off events. [2022-11-25 18:16:33,069 INFO L131 PetriNetUnfolder]: For 347657/347657 co-relation queries the response was YES. [2022-11-25 18:16:33,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113006 conditions, 12006 events. 7496/12006 cut-off events. For 347657/347657 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 81217 event pairs, 2139 based on Foata normal form. 48/12054 useless extension candidates. Maximal degree in co-relation 111899. Up to 5196 conditions per place. [2022-11-25 18:16:33,277 INFO L137 encePairwiseOnDemand]: 178/186 looper letters, 399 selfloop transitions, 187 changer transitions 2/588 dead transitions. [2022-11-25 18:16:33,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 588 transitions, 11187 flow [2022-11-25 18:16:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:16:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:16:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 634 transitions. [2022-11-25 18:16:33,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4869431643625192 [2022-11-25 18:16:33,281 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 634 transitions. [2022-11-25 18:16:33,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 634 transitions. [2022-11-25 18:16:33,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:33,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 634 transitions. [2022-11-25 18:16:33,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:33,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:33,286 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:33,286 INFO L175 Difference]: Start difference. First operand has 170 places, 427 transitions, 7434 flow. Second operand 7 states and 634 transitions. [2022-11-25 18:16:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 588 transitions, 11187 flow [2022-11-25 18:16:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 588 transitions, 10595 flow, removed 296 selfloop flow, removed 0 redundant places. [2022-11-25 18:16:35,173 INFO L231 Difference]: Finished difference. Result has 180 places, 480 transitions, 8719 flow [2022-11-25 18:16:35,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8719, PETRI_PLACES=180, PETRI_TRANSITIONS=480} [2022-11-25 18:16:35,174 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2022-11-25 18:16:35,174 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 480 transitions, 8719 flow [2022-11-25 18:16:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 79.3076923076923) internal successors, (1031), 13 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:35,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:35,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:35,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:35,376 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:16:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1501710418, now seen corresponding path program 8 times [2022-11-25 18:16:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:35,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930745421] [2022-11-25 18:16:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:35,615 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 18:16:35,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930745421] [2022-11-25 18:16:35,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930745421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912997394] [2022-11-25 18:16:35,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:16:35,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:35,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:35,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:16:35,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:16:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:16:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:35,955 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 18:16:35,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:36,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912997394] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:36,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:16:36,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-25 18:16:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706914539] [2022-11-25 18:16:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:36,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:16:36,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-25 18:16:36,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 480 transitions, 8719 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:36,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:36,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-25 18:16:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:39,386 INFO L130 PetriNetUnfolder]: 7356/11804 cut-off events. [2022-11-25 18:16:39,386 INFO L131 PetriNetUnfolder]: For 340909/341027 co-relation queries the response was YES. [2022-11-25 18:16:39,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110739 conditions, 11804 events. 7356/11804 cut-off events. For 340909/341027 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 80044 event pairs, 2097 based on Foata normal form. 78/11841 useless extension candidates. Maximal degree in co-relation 109585. Up to 5543 conditions per place. [2022-11-25 18:16:39,577 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 416 selfloop transitions, 127 changer transitions 1/563 dead transitions. [2022-11-25 18:16:39,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 563 transitions, 10893 flow [2022-11-25 18:16:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:16:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-11-25 18:16:39,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.517921146953405 [2022-11-25 18:16:39,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-11-25 18:16:39,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-11-25 18:16:39,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:39,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-11-25 18:16:39,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:39,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:39,593 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:39,593 INFO L175 Difference]: Start difference. First operand has 180 places, 480 transitions, 8719 flow. Second operand 6 states and 578 transitions. [2022-11-25 18:16:39,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 563 transitions, 10893 flow [2022-11-25 18:16:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 563 transitions, 10863 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-25 18:16:41,448 INFO L231 Difference]: Finished difference. Result has 188 places, 483 transitions, 9126 flow [2022-11-25 18:16:41,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9126, PETRI_PLACES=188, PETRI_TRANSITIONS=483} [2022-11-25 18:16:41,449 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2022-11-25 18:16:41,449 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 483 transitions, 9126 flow [2022-11-25 18:16:41,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:41,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:41,450 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:41,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:41,653 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:16:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash 557501910, now seen corresponding path program 9 times [2022-11-25 18:16:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013723404] [2022-11-25 18:16:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:41,874 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 18:16:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013723404] [2022-11-25 18:16:41,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013723404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731916493] [2022-11-25 18:16:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:16:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:41,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:41,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:41,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:16:42,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:16:42,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:16:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:42,199 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 18:16:42,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:42,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731916493] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:42,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:16:42,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-25 18:16:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6967986] [2022-11-25 18:16:42,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:42,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:42,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:16:42,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-25 18:16:42,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 483 transitions, 9126 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:42,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:42,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-25 18:16:42,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:45,739 INFO L130 PetriNetUnfolder]: 7321/11731 cut-off events. [2022-11-25 18:16:45,740 INFO L131 PetriNetUnfolder]: For 351531/351649 co-relation queries the response was YES. [2022-11-25 18:16:45,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111972 conditions, 11731 events. 7321/11731 cut-off events. For 351531/351649 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 79338 event pairs, 2136 based on Foata normal form. 61/11751 useless extension candidates. Maximal degree in co-relation 110774. Up to 5333 conditions per place. [2022-11-25 18:16:45,867 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 435 selfloop transitions, 121 changer transitions 1/576 dead transitions. [2022-11-25 18:16:45,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 576 transitions, 11446 flow [2022-11-25 18:16:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:16:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 582 transitions. [2022-11-25 18:16:45,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.521505376344086 [2022-11-25 18:16:45,870 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 582 transitions. [2022-11-25 18:16:45,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 582 transitions. [2022-11-25 18:16:45,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:45,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 582 transitions. [2022-11-25 18:16:45,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:45,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:45,874 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:45,874 INFO L175 Difference]: Start difference. First operand has 188 places, 483 transitions, 9126 flow. Second operand 6 states and 582 transitions. [2022-11-25 18:16:45,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 576 transitions, 11446 flow [2022-11-25 18:16:47,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 576 transitions, 11260 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:47,622 INFO L231 Difference]: Finished difference. Result has 194 places, 486 transitions, 9372 flow [2022-11-25 18:16:47,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=8945, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9372, PETRI_PLACES=194, PETRI_TRANSITIONS=486} [2022-11-25 18:16:47,623 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2022-11-25 18:16:47,623 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 486 transitions, 9372 flow [2022-11-25 18:16:47,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:47,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:47,624 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:47,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:47,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:47,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:16:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:47,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1636202782, now seen corresponding path program 10 times [2022-11-25 18:16:47,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:47,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405001130] [2022-11-25 18:16:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:47,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:48,133 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 18:16:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405001130] [2022-11-25 18:16:48,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405001130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:48,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864818749] [2022-11-25 18:16:48,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:16:48,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:48,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:48,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:16:48,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:16:48,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:16:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:48,357 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 18:16:48,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:48,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864818749] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:48,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:16:48,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2022-11-25 18:16:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142407373] [2022-11-25 18:16:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:48,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:48,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:16:48,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-25 18:16:48,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 486 transitions, 9372 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:48,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:48,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-25 18:16:48,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:51,949 INFO L130 PetriNetUnfolder]: 7269/11599 cut-off events. [2022-11-25 18:16:51,949 INFO L131 PetriNetUnfolder]: For 354435/354553 co-relation queries the response was YES. [2022-11-25 18:16:52,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111576 conditions, 11599 events. 7269/11599 cut-off events. For 354435/354553 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 77860 event pairs, 2136 based on Foata normal form. 68/11626 useless extension candidates. Maximal degree in co-relation 110391. Up to 5333 conditions per place. [2022-11-25 18:16:52,078 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 432 selfloop transitions, 119 changer transitions 1/571 dead transitions. [2022-11-25 18:16:52,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 571 transitions, 11580 flow [2022-11-25 18:16:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:16:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-11-25 18:16:52,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.517921146953405 [2022-11-25 18:16:52,080 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-11-25 18:16:52,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-11-25 18:16:52,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:52,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-11-25 18:16:52,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:52,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:52,083 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:52,083 INFO L175 Difference]: Start difference. First operand has 194 places, 486 transitions, 9372 flow. Second operand 6 states and 578 transitions. [2022-11-25 18:16:52,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 571 transitions, 11580 flow [2022-11-25 18:16:53,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 571 transitions, 11412 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:53,860 INFO L231 Difference]: Finished difference. Result has 199 places, 489 transitions, 9553 flow [2022-11-25 18:16:53,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=9204, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9553, PETRI_PLACES=199, PETRI_TRANSITIONS=489} [2022-11-25 18:16:53,861 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2022-11-25 18:16:53,861 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 489 transitions, 9553 flow [2022-11-25 18:16:53,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:53,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:53,862 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:53,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:54,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:16:54,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:16:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1108190162, now seen corresponding path program 11 times [2022-11-25 18:16:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:54,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216021217] [2022-11-25 18:16:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:54,302 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 18:16:54,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:54,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216021217] [2022-11-25 18:16:54,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216021217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:54,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075872076] [2022-11-25 18:16:54,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:16:54,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:54,304 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:54,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:16:54,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:16:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:54,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:16:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:54,748 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 18:16:54,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:54,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075872076] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:54,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:16:54,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-25 18:16:54,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362767050] [2022-11-25 18:16:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:54,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:16:54,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-25 18:16:54,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 489 transitions, 9553 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:54,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:54,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-25 18:16:54,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:58,178 INFO L130 PetriNetUnfolder]: 7237/11527 cut-off events. [2022-11-25 18:16:58,178 INFO L131 PetriNetUnfolder]: For 356546/356664 co-relation queries the response was YES. [2022-11-25 18:16:58,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111491 conditions, 11527 events. 7237/11527 cut-off events. For 356546/356664 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 77023 event pairs, 2080 based on Foata normal form. 56/11542 useless extension candidates. Maximal degree in co-relation 110304. Up to 5543 conditions per place. [2022-11-25 18:16:58,303 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 415 selfloop transitions, 130 changer transitions 1/565 dead transitions. [2022-11-25 18:16:58,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 565 transitions, 11628 flow [2022-11-25 18:16:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:16:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 576 transitions. [2022-11-25 18:16:58,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2022-11-25 18:16:58,305 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 576 transitions. [2022-11-25 18:16:58,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 576 transitions. [2022-11-25 18:16:58,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:58,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 576 transitions. [2022-11-25 18:16:58,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:58,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:58,309 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:58,310 INFO L175 Difference]: Start difference. First operand has 199 places, 489 transitions, 9553 flow. Second operand 6 states and 576 transitions. [2022-11-25 18:16:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 565 transitions, 11628 flow [2022-11-25 18:17:00,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 565 transitions, 11409 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-11-25 18:17:00,071 INFO L231 Difference]: Finished difference. Result has 203 places, 492 transitions, 9699 flow [2022-11-25 18:17:00,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=9338, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9699, PETRI_PLACES=203, PETRI_TRANSITIONS=492} [2022-11-25 18:17:00,074 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 174 predicate places. [2022-11-25 18:17:00,074 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 492 transitions, 9699 flow [2022-11-25 18:17:00,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:00,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:00,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:17:00,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:17:00,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:17:00,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash 729429802, now seen corresponding path program 2 times [2022-11-25 18:17:00,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:00,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471808662] [2022-11-25 18:17:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:00,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:00,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471808662] [2022-11-25 18:17:00,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471808662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:00,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:00,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:17:00,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342642500] [2022-11-25 18:17:00,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:00,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:17:00,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:17:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:17:00,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-25 18:17:00,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 492 transitions, 9699 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:00,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:00,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-25 18:17:00,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:04,019 INFO L130 PetriNetUnfolder]: 7370/11757 cut-off events. [2022-11-25 18:17:04,020 INFO L131 PetriNetUnfolder]: For 369005/369005 co-relation queries the response was YES. [2022-11-25 18:17:04,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113768 conditions, 11757 events. 7370/11757 cut-off events. For 369005/369005 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 78910 event pairs, 2334 based on Foata normal form. 23/11780 useless extension candidates. Maximal degree in co-relation 112126. Up to 7304 conditions per place. [2022-11-25 18:17:04,184 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 505 selfloop transitions, 126 changer transitions 23/654 dead transitions. [2022-11-25 18:17:04,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 654 transitions, 13334 flow [2022-11-25 18:17:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:17:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:17:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 929 transitions. [2022-11-25 18:17:04,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49946236559139784 [2022-11-25 18:17:04,188 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 929 transitions. [2022-11-25 18:17:04,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 929 transitions. [2022-11-25 18:17:04,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:04,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 929 transitions. [2022-11-25 18:17:04,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.9) internal successors, (929), 10 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:04,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 186.0) internal successors, (2046), 11 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:04,197 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 186.0) internal successors, (2046), 11 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:04,197 INFO L175 Difference]: Start difference. First operand has 203 places, 492 transitions, 9699 flow. Second operand 10 states and 929 transitions. [2022-11-25 18:17:04,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 654 transitions, 13334 flow [2022-11-25 18:17:06,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 654 transitions, 13053 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-25 18:17:06,155 INFO L231 Difference]: Finished difference. Result has 213 places, 524 transitions, 10515 flow [2022-11-25 18:17:06,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=9442, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10515, PETRI_PLACES=213, PETRI_TRANSITIONS=524} [2022-11-25 18:17:06,155 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2022-11-25 18:17:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 524 transitions, 10515 flow [2022-11-25 18:17:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:06,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:06,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:17:06,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:17:06,157 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1816874740, now seen corresponding path program 3 times [2022-11-25 18:17:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:06,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487924814] [2022-11-25 18:17:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487924814] [2022-11-25 18:17:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487924814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:06,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:06,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:17:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74269603] [2022-11-25 18:17:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:17:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:17:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:17:06,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 186 [2022-11-25 18:17:06,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 524 transitions, 10515 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:06,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:06,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 186 [2022-11-25 18:17:06,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:09,840 INFO L130 PetriNetUnfolder]: 7313/11717 cut-off events. [2022-11-25 18:17:09,840 INFO L131 PetriNetUnfolder]: For 423279/423279 co-relation queries the response was YES. [2022-11-25 18:17:09,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117935 conditions, 11717 events. 7313/11717 cut-off events. For 423279/423279 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 79287 event pairs, 2412 based on Foata normal form. 45/11762 useless extension candidates. Maximal degree in co-relation 116340. Up to 7703 conditions per place. [2022-11-25 18:17:09,991 INFO L137 encePairwiseOnDemand]: 178/186 looper letters, 502 selfloop transitions, 113 changer transitions 12/627 dead transitions. [2022-11-25 18:17:09,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 627 transitions, 13311 flow [2022-11-25 18:17:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:17:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:17:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 663 transitions. [2022-11-25 18:17:09,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5092165898617511 [2022-11-25 18:17:09,993 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 663 transitions. [2022-11-25 18:17:09,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 663 transitions. [2022-11-25 18:17:09,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:09,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 663 transitions. [2022-11-25 18:17:09,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.71428571428571) internal successors, (663), 7 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:09,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:09,999 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:09,999 INFO L175 Difference]: Start difference. First operand has 213 places, 524 transitions, 10515 flow. Second operand 7 states and 663 transitions. [2022-11-25 18:17:09,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 627 transitions, 13311 flow [2022-11-25 18:17:12,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 627 transitions, 13010 flow, removed 121 selfloop flow, removed 1 redundant places. [2022-11-25 18:17:12,423 INFO L231 Difference]: Finished difference. Result has 221 places, 533 transitions, 10771 flow [2022-11-25 18:17:12,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=10274, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10771, PETRI_PLACES=221, PETRI_TRANSITIONS=533} [2022-11-25 18:17:12,424 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2022-11-25 18:17:12,424 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 533 transitions, 10771 flow [2022-11-25 18:17:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:12,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:12,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:17:12,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:17:12,426 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2107360515, now seen corresponding path program 1 times [2022-11-25 18:17:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:12,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447937128] [2022-11-25 18:17:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:12,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:12,680 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 18:17:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447937128] [2022-11-25 18:17:12,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447937128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:17:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977884999] [2022-11-25 18:17:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:17:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:17:12,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:17:12,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:17:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:12,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:17:12,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:17:13,031 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 18:17:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:17:13,396 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 18:17:13,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977884999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:17:13,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:17:13,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-11-25 18:17:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107157574] [2022-11-25 18:17:13,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:17:13,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:17:13,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:17:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:17:13,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 186 [2022-11-25 18:17:13,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 533 transitions, 10771 flow. Second operand has 16 states, 16 states have (on average 82.1875) internal successors, (1315), 16 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:13,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:13,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 186 [2022-11-25 18:17:13,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:23,192 INFO L130 PetriNetUnfolder]: 13526/21994 cut-off events. [2022-11-25 18:17:23,192 INFO L131 PetriNetUnfolder]: For 779155/779155 co-relation queries the response was YES. [2022-11-25 18:17:23,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218934 conditions, 21994 events. 13526/21994 cut-off events. For 779155/779155 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 167819 event pairs, 2250 based on Foata normal form. 124/22118 useless extension candidates. Maximal degree in co-relation 218507. Up to 8648 conditions per place. [2022-11-25 18:17:23,496 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 754 selfloop transitions, 557 changer transitions 2/1313 dead transitions. [2022-11-25 18:17:23,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1313 transitions, 25719 flow [2022-11-25 18:17:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 18:17:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 18:17:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3080 transitions. [2022-11-25 18:17:23,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5017921146953405 [2022-11-25 18:17:23,502 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3080 transitions. [2022-11-25 18:17:23,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3080 transitions. [2022-11-25 18:17:23,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:23,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3080 transitions. [2022-11-25 18:17:23,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 93.33333333333333) internal successors, (3080), 33 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 18:17:23,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 186.0) internal successors, (6324), 34 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:23,516 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 186.0) internal successors, (6324), 34 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:23,517 INFO L175 Difference]: Start difference. First operand has 221 places, 533 transitions, 10771 flow. Second operand 33 states and 3080 transitions. [2022-11-25 18:17:23,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1313 transitions, 25719 flow [2022-11-25 18:17:28,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1313 transitions, 25572 flow, removed 25 selfloop flow, removed 2 redundant places. [2022-11-25 18:17:28,785 INFO L231 Difference]: Finished difference. Result has 280 places, 858 transitions, 19463 flow [2022-11-25 18:17:28,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=10646, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=19463, PETRI_PLACES=280, PETRI_TRANSITIONS=858} [2022-11-25 18:17:28,785 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 251 predicate places. [2022-11-25 18:17:28,785 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 858 transitions, 19463 flow [2022-11-25 18:17:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.1875) internal successors, (1315), 16 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:28,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:28,786 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:17:28,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:17:28,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:17:28,987 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1094993466, now seen corresponding path program 4 times [2022-11-25 18:17:28,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:28,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106031428] [2022-11-25 18:17:28,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:28,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:29,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106031428] [2022-11-25 18:17:29,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106031428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:17:29,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:17:29,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:17:29,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548252675] [2022-11-25 18:17:29,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:17:29,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:17:29,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:17:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:17:29,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 186 [2022-11-25 18:17:29,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 858 transitions, 19463 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:29,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:29,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 186 [2022-11-25 18:17:29,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:17:38,776 INFO L130 PetriNetUnfolder]: 13461/21901 cut-off events. [2022-11-25 18:17:38,776 INFO L131 PetriNetUnfolder]: For 1013258/1013258 co-relation queries the response was YES. [2022-11-25 18:17:39,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243860 conditions, 21901 events. 13461/21901 cut-off events. For 1013258/1013258 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 166820 event pairs, 4807 based on Foata normal form. 45/21946 useless extension candidates. Maximal degree in co-relation 241664. Up to 15614 conditions per place. [2022-11-25 18:17:39,171 INFO L137 encePairwiseOnDemand]: 178/186 looper letters, 873 selfloop transitions, 124 changer transitions 13/1010 dead transitions. [2022-11-25 18:17:39,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1010 transitions, 24155 flow [2022-11-25 18:17:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:17:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:17:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2022-11-25 18:17:39,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2022-11-25 18:17:39,174 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2022-11-25 18:17:39,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2022-11-25 18:17:39,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:17:39,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2022-11-25 18:17:39,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:39,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:39,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:39,177 INFO L175 Difference]: Start difference. First operand has 280 places, 858 transitions, 19463 flow. Second operand 7 states and 654 transitions. [2022-11-25 18:17:39,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1010 transitions, 24155 flow [2022-11-25 18:17:49,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1010 transitions, 23454 flow, removed 266 selfloop flow, removed 2 redundant places. [2022-11-25 18:17:49,718 INFO L231 Difference]: Finished difference. Result has 286 places, 857 transitions, 19054 flow [2022-11-25 18:17:49,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=18751, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19054, PETRI_PLACES=286, PETRI_TRANSITIONS=857} [2022-11-25 18:17:49,719 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2022-11-25 18:17:49,719 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 857 transitions, 19054 flow [2022-11-25 18:17:49,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:49,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:17:49,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:17:49,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:17:49,720 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:17:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -100981475, now seen corresponding path program 2 times [2022-11-25 18:17:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:49,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488282055] [2022-11-25 18:17:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:49,893 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 18:17:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488282055] [2022-11-25 18:17:49,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488282055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:17:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711245283] [2022-11-25 18:17:49,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:17:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:17:49,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:17:49,899 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:17:49,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1715e1c8-f8ae-4eb4-82d7-e647ff740f04/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:17:50,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:17:50,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:17:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:17:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:17:50,122 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 18:17:50,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:17:50,304 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 18:17:50,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711245283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:17:50,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:17:50,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 18:17:50,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356433611] [2022-11-25 18:17:50,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:17:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:17:50,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:17:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:17:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:17:50,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-25 18:17:50,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 857 transitions, 19054 flow. Second operand has 12 states, 12 states have (on average 83.75) internal successors, (1005), 12 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:50,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:50,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-25 18:17:50,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand