./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN --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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- 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-6b4ec56 [2022-11-20 12:06:00,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:06:00,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:06:00,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:06:00,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:06:00,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:06:00,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:06:00,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:06:00,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:06:00,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:06:00,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:06:00,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:06:00,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:06:00,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:06:00,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:06:00,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:06:00,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:06:00,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:06:00,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:06:00,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:06:01,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:06:01,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:06:01,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:06:01,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:06:01,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:06:01,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:06:01,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:06:01,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:06:01,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:06:01,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:06:01,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:06:01,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:06:01,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:06:01,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:06:01,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:06:01,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:06:01,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:06:01,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:06:01,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:06:01,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:06:01,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:06:01,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:06:01,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:06:01,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:06:01,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:06:01,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:06:01,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:06:01,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:06:01,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:06:01,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:06:01,056 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:06:01,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:06:01,057 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:06:01,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:06:01,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:06:01,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:06:01,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:06:01,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:06:01,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:06:01,059 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:06:01,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:06:01,060 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:06:01,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:06:01,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:06:01,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:06:01,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:06:01,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:06:01,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:06:01,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:06:01,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:06:01,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:06:01,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:06:01,063 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:06:01,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:06:01,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:06:01,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-11-20 12:06:01,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:06:01,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:06:01,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:06:01,442 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:06:01,443 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:06:01,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-11-20 12:06:04,656 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:06:04,881 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:06:04,881 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-11-20 12:06:04,889 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/data/75f220e18/7cca4844905643169227807cd585db3e/FLAG47a251c54 [2022-11-20 12:06:04,911 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/data/75f220e18/7cca4844905643169227807cd585db3e [2022-11-20 12:06:04,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:06:04,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:06:04,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:06:04,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:06:04,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:06:04,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:06:04" (1/1) ... [2022-11-20 12:06:04,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc7559d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:04, skipping insertion in model container [2022-11-20 12:06:04,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:06:04" (1/1) ... [2022-11-20 12:06:04,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:06:05,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:06:05,178 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_8a92dcd7-32c1-4123-a93d-186b340e6536/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-11-20 12:06:05,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:06:05,197 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:06:05,221 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_8a92dcd7-32c1-4123-a93d-186b340e6536/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-11-20 12:06:05,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:06:05,240 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:06:05,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05 WrapperNode [2022-11-20 12:06:05,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:06:05,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:06:05,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:06:05,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:06:05,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,288 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 162 [2022-11-20 12:06:05,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:06:05,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:06:05,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:06:05,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:06:05,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:06:05,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:06:05,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:06:05,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:06:05,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (1/1) ... [2022-11-20 12:06:05,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:06:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:05,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:06:05,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:06:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:06:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:06:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:06:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:06:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:06:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:06:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:06:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:06:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:06:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:06:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:06:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:06:05,407 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:06:05,517 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:06:05,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:06:05,868 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:06:05,884 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:06:05,884 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:06:05,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:06:05 BoogieIcfgContainer [2022-11-20 12:06:05,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:06:05,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:06:05,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:06:05,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:06:05,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:06:04" (1/3) ... [2022-11-20 12:06:05,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c89632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:06:05, skipping insertion in model container [2022-11-20 12:06:05,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:06:05" (2/3) ... [2022-11-20 12:06:05,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c89632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:06:05, skipping insertion in model container [2022-11-20 12:06:05,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:06:05" (3/3) ... [2022-11-20 12:06:05,916 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-11-20 12:06:05,941 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:06:05,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:06:05,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:06:05,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:06:06,173 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:06:06,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 220 transitions, 456 flow [2022-11-20 12:06:06,343 INFO L130 PetriNetUnfolder]: 14/218 cut-off events. [2022-11-20 12:06:06,353 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:06:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 14/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 315 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-11-20 12:06:06,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 220 transitions, 456 flow [2022-11-20 12:06:06,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 209 transitions, 430 flow [2022-11-20 12:06:06,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:06:06,406 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;@2728de57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:06:06,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 12:06:06,476 INFO L130 PetriNetUnfolder]: 8/149 cut-off events. [2022-11-20 12:06:06,476 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:06:06,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:06,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:06,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1622558315, now seen corresponding path program 1 times [2022-11-20 12:06:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:06,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976878614] [2022-11-20 12:06:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:06,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976878614] [2022-11-20 12:06:06,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976878614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:06,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:06,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:06:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351694956] [2022-11-20 12:06:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:06,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:06:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:06:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:06:06,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 220 [2022-11-20 12:06:06,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 209 transitions, 430 flow. Second operand has 2 states, 2 states have (on average 206.0) internal successors, (412), 2 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:06,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:06,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 220 [2022-11-20 12:06:06,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:06,989 INFO L130 PetriNetUnfolder]: 2/197 cut-off events. [2022-11-20 12:06:06,989 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 12:06:06,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 197 events. 2/197 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 262 event pairs, 0 based on Foata normal form. 14/199 useless extension candidates. Maximal degree in co-relation 134. Up to 5 conditions per place. [2022-11-20 12:06:06,997 INFO L137 encePairwiseOnDemand]: 208/220 looper letters, 4 selfloop transitions, 0 changer transitions 2/197 dead transitions. [2022-11-20 12:06:06,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 414 flow [2022-11-20 12:06:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:06:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:06:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 422 transitions. [2022-11-20 12:06:07,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9590909090909091 [2022-11-20 12:06:07,026 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 422 transitions. [2022-11-20 12:06:07,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 422 transitions. [2022-11-20 12:06:07,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:07,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 422 transitions. [2022-11-20 12:06:07,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:07,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:07,050 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:07,052 INFO L175 Difference]: Start difference. First operand has 202 places, 209 transitions, 430 flow. Second operand 2 states and 422 transitions. [2022-11-20 12:06:07,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 414 flow [2022-11-20 12:06:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 197 transitions, 406 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:06:07,065 INFO L231 Difference]: Finished difference. Result has 199 places, 195 transitions, 394 flow [2022-11-20 12:06:07,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=394, PETRI_PLACES=199, PETRI_TRANSITIONS=195} [2022-11-20 12:06:07,076 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -3 predicate places. [2022-11-20 12:06:07,076 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 195 transitions, 394 flow [2022-11-20 12:06:07,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 206.0) internal successors, (412), 2 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:07,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:07,078 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:07,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:06:07,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash 486725857, now seen corresponding path program 1 times [2022-11-20 12:06:07,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:07,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626912356] [2022-11-20 12:06:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626912356] [2022-11-20 12:06:08,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626912356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:08,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:08,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:06:08,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375636032] [2022-11-20 12:06:08,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:06:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:06:08,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:06:08,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 220 [2022-11-20 12:06:08,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 195 transitions, 394 flow. Second operand has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:08,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:08,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 220 [2022-11-20 12:06:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:08,780 INFO L130 PetriNetUnfolder]: 57/754 cut-off events. [2022-11-20 12:06:08,785 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 12:06:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 754 events. 57/754 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3730 event pairs, 7 based on Foata normal form. 1/695 useless extension candidates. Maximal degree in co-relation 895. Up to 97 conditions per place. [2022-11-20 12:06:08,791 INFO L137 encePairwiseOnDemand]: 210/220 looper letters, 37 selfloop transitions, 7 changer transitions 6/217 dead transitions. [2022-11-20 12:06:08,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 217 transitions, 544 flow [2022-11-20 12:06:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:06:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:06:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1644 transitions. [2022-11-20 12:06:08,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2022-11-20 12:06:08,798 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1644 transitions. [2022-11-20 12:06:08,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1644 transitions. [2022-11-20 12:06:08,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:08,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1644 transitions. [2022-11-20 12:06:08,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.66666666666666) internal successors, (1644), 9 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:08,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:08,813 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:08,813 INFO L175 Difference]: Start difference. First operand has 199 places, 195 transitions, 394 flow. Second operand 9 states and 1644 transitions. [2022-11-20 12:06:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 217 transitions, 544 flow [2022-11-20 12:06:08,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 217 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:06:08,825 INFO L231 Difference]: Finished difference. Result has 210 places, 199 transitions, 436 flow [2022-11-20 12:06:08,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=210, PETRI_TRANSITIONS=199} [2022-11-20 12:06:08,827 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 8 predicate places. [2022-11-20 12:06:08,827 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 199 transitions, 436 flow [2022-11-20 12:06:08,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:08,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:08,829 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:08,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:06:08,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1018501207, now seen corresponding path program 2 times [2022-11-20 12:06:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590493996] [2022-11-20 12:06:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:08,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590493996] [2022-11-20 12:06:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590493996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:09,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:09,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:06:09,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104707731] [2022-11-20 12:06:09,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:09,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:06:09,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:06:09,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:06:09,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 220 [2022-11-20 12:06:09,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 199 transitions, 436 flow. Second operand has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:09,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 220 [2022-11-20 12:06:09,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:09,897 INFO L130 PetriNetUnfolder]: 57/759 cut-off events. [2022-11-20 12:06:09,897 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-20 12:06:09,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 759 events. 57/759 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3752 event pairs, 5 based on Foata normal form. 1/701 useless extension candidates. Maximal degree in co-relation 961. Up to 97 conditions per place. [2022-11-20 12:06:09,903 INFO L137 encePairwiseOnDemand]: 210/220 looper letters, 32 selfloop transitions, 8 changer transitions 6/213 dead transitions. [2022-11-20 12:06:09,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 213 transitions, 574 flow [2022-11-20 12:06:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:06:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:06:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1639 transitions. [2022-11-20 12:06:09,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8277777777777777 [2022-11-20 12:06:09,910 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1639 transitions. [2022-11-20 12:06:09,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1639 transitions. [2022-11-20 12:06:09,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:09,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1639 transitions. [2022-11-20 12:06:09,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.11111111111111) internal successors, (1639), 9 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,926 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,926 INFO L175 Difference]: Start difference. First operand has 210 places, 199 transitions, 436 flow. Second operand 9 states and 1639 transitions. [2022-11-20 12:06:09,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 213 transitions, 574 flow [2022-11-20 12:06:09,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 213 transitions, 560 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-20 12:06:09,934 INFO L231 Difference]: Finished difference. Result has 215 places, 201 transitions, 468 flow [2022-11-20 12:06:09,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=468, PETRI_PLACES=215, PETRI_TRANSITIONS=201} [2022-11-20 12:06:09,935 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 13 predicate places. [2022-11-20 12:06:09,936 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 201 transitions, 468 flow [2022-11-20 12:06:09,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:09,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:09,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:06:09,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:09,939 INFO L85 PathProgramCache]: Analyzing trace with hash 824399851, now seen corresponding path program 1 times [2022-11-20 12:06:09,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:09,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466774375] [2022-11-20 12:06:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:09,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:10,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466774375] [2022-11-20 12:06:10,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466774375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:10,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:10,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:06:10,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894447941] [2022-11-20 12:06:10,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:10,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:06:10,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:06:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:06:10,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:10,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 201 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:10,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:10,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:10,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:10,500 INFO L130 PetriNetUnfolder]: 90/1434 cut-off events. [2022-11-20 12:06:10,500 INFO L131 PetriNetUnfolder]: For 53/55 co-relation queries the response was YES. [2022-11-20 12:06:10,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1434 events. 90/1434 cut-off events. For 53/55 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8255 event pairs, 30 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 1725. Up to 97 conditions per place. [2022-11-20 12:06:10,511 INFO L137 encePairwiseOnDemand]: 213/220 looper letters, 27 selfloop transitions, 5 changer transitions 3/220 dead transitions. [2022-11-20 12:06:10,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 220 transitions, 580 flow [2022-11-20 12:06:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:06:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:06:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1182 transitions. [2022-11-20 12:06:10,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8954545454545455 [2022-11-20 12:06:10,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1182 transitions. [2022-11-20 12:06:10,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1182 transitions. [2022-11-20 12:06:10,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:10,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1182 transitions. [2022-11-20 12:06:10,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:10,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:10,526 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:10,526 INFO L175 Difference]: Start difference. First operand has 215 places, 201 transitions, 468 flow. Second operand 6 states and 1182 transitions. [2022-11-20 12:06:10,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 220 transitions, 580 flow [2022-11-20 12:06:10,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 220 transitions, 563 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-20 12:06:10,535 INFO L231 Difference]: Finished difference. Result has 214 places, 203 transitions, 477 flow [2022-11-20 12:06:10,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=477, PETRI_PLACES=214, PETRI_TRANSITIONS=203} [2022-11-20 12:06:10,536 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 12 predicate places. [2022-11-20 12:06:10,537 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 203 transitions, 477 flow [2022-11-20 12:06:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:10,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:10,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:10,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:06:10,539 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1704802457, now seen corresponding path program 2 times [2022-11-20 12:06:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541150679] [2022-11-20 12:06:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:10,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541150679] [2022-11-20 12:06:10,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541150679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848686365] [2022-11-20 12:06:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:06:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:10,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:10,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:06:10,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:06:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:06:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:11,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:11,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848686365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:11,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:11,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-20 12:06:11,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169031731] [2022-11-20 12:06:11,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:06:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:06:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:06:11,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:11,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 203 transitions, 477 flow. Second operand has 9 states, 9 states have (on average 193.44444444444446) internal successors, (1741), 9 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:11,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:11,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:11,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:12,323 INFO L130 PetriNetUnfolder]: 139/2415 cut-off events. [2022-11-20 12:06:12,323 INFO L131 PetriNetUnfolder]: For 187/188 co-relation queries the response was YES. [2022-11-20 12:06:12,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2957 conditions, 2415 events. 139/2415 cut-off events. For 187/188 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 16449 event pairs, 4 based on Foata normal form. 7/2265 useless extension candidates. Maximal degree in co-relation 2945. Up to 57 conditions per place. [2022-11-20 12:06:12,345 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 51 selfloop transitions, 31 changer transitions 1/268 dead transitions. [2022-11-20 12:06:12,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 268 transitions, 857 flow [2022-11-20 12:06:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:06:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 12:06:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2750 transitions. [2022-11-20 12:06:12,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2022-11-20 12:06:12,356 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2750 transitions. [2022-11-20 12:06:12,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2750 transitions. [2022-11-20 12:06:12,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:12,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2750 transitions. [2022-11-20 12:06:12,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 196.42857142857142) internal successors, (2750), 14 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:12,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 220.0) internal successors, (3300), 15 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:12,379 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 220.0) internal successors, (3300), 15 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:12,379 INFO L175 Difference]: Start difference. First operand has 214 places, 203 transitions, 477 flow. Second operand 14 states and 2750 transitions. [2022-11-20 12:06:12,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 268 transitions, 857 flow [2022-11-20 12:06:12,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 268 transitions, 830 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-20 12:06:12,394 INFO L231 Difference]: Finished difference. Result has 230 places, 235 transitions, 689 flow [2022-11-20 12:06:12,394 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=689, PETRI_PLACES=230, PETRI_TRANSITIONS=235} [2022-11-20 12:06:12,397 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 28 predicate places. [2022-11-20 12:06:12,398 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 235 transitions, 689 flow [2022-11-20 12:06:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.44444444444446) internal successors, (1741), 9 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:12,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:12,399 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:12,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:12,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:12,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1304616419, now seen corresponding path program 1 times [2022-11-20 12:06:12,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:12,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041947401] [2022-11-20 12:06:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:12,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041947401] [2022-11-20 12:06:12,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041947401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:12,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:12,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:06:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107422853] [2022-11-20 12:06:12,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:12,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:06:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:06:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:06:12,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:12,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 235 transitions, 689 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:12,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:12,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:12,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:13,622 INFO L130 PetriNetUnfolder]: 168/2767 cut-off events. [2022-11-20 12:06:13,623 INFO L131 PetriNetUnfolder]: For 666/670 co-relation queries the response was YES. [2022-11-20 12:06:13,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 2767 events. 168/2767 cut-off events. For 666/670 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 19751 event pairs, 42 based on Foata normal form. 3/2578 useless extension candidates. Maximal degree in co-relation 3696. Up to 155 conditions per place. [2022-11-20 12:06:13,646 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 71 selfloop transitions, 24 changer transitions 4/284 dead transitions. [2022-11-20 12:06:13,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 284 transitions, 1135 flow [2022-11-20 12:06:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:06:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:06:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2022-11-20 12:06:13,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9053030303030303 [2022-11-20 12:06:13,650 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2022-11-20 12:06:13,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2022-11-20 12:06:13,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:13,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2022-11-20 12:06:13,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,659 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,659 INFO L175 Difference]: Start difference. First operand has 230 places, 235 transitions, 689 flow. Second operand 6 states and 1195 transitions. [2022-11-20 12:06:13,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 284 transitions, 1135 flow [2022-11-20 12:06:13,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 284 transitions, 1131 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-20 12:06:13,672 INFO L231 Difference]: Finished difference. Result has 238 places, 245 transitions, 850 flow [2022-11-20 12:06:13,672 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=850, PETRI_PLACES=238, PETRI_TRANSITIONS=245} [2022-11-20 12:06:13,675 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 36 predicate places. [2022-11-20 12:06:13,676 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 245 transitions, 850 flow [2022-11-20 12:06:13,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:13,677 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:13,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:06:13,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -962132957, now seen corresponding path program 2 times [2022-11-20 12:06:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664682530] [2022-11-20 12:06:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:13,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:13,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664682530] [2022-11-20 12:06:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664682530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:13,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:13,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:06:13,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325491352] [2022-11-20 12:06:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:13,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:06:13,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:06:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:06:13,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:13,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 245 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:13,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:13,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:14,515 INFO L130 PetriNetUnfolder]: 163/2580 cut-off events. [2022-11-20 12:06:14,515 INFO L131 PetriNetUnfolder]: For 1011/1014 co-relation queries the response was YES. [2022-11-20 12:06:14,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3686 conditions, 2580 events. 163/2580 cut-off events. For 1011/1014 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 18033 event pairs, 42 based on Foata normal form. 4/2405 useless extension candidates. Maximal degree in co-relation 3664. Up to 162 conditions per place. [2022-11-20 12:06:14,541 INFO L137 encePairwiseOnDemand]: 213/220 looper letters, 57 selfloop transitions, 15 changer transitions 5/262 dead transitions. [2022-11-20 12:06:14,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 262 transitions, 1114 flow [2022-11-20 12:06:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:06:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:06:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1183 transitions. [2022-11-20 12:06:14,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8962121212121212 [2022-11-20 12:06:14,546 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1183 transitions. [2022-11-20 12:06:14,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1183 transitions. [2022-11-20 12:06:14,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:14,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1183 transitions. [2022-11-20 12:06:14,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.16666666666666) internal successors, (1183), 6 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:14,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:14,557 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:14,557 INFO L175 Difference]: Start difference. First operand has 238 places, 245 transitions, 850 flow. Second operand 6 states and 1183 transitions. [2022-11-20 12:06:14,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 262 transitions, 1114 flow [2022-11-20 12:06:14,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 262 transitions, 1088 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-20 12:06:14,573 INFO L231 Difference]: Finished difference. Result has 244 places, 245 transitions, 863 flow [2022-11-20 12:06:14,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=244, PETRI_TRANSITIONS=245} [2022-11-20 12:06:14,574 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 42 predicate places. [2022-11-20 12:06:14,574 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 245 transitions, 863 flow [2022-11-20 12:06:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:14,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:14,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:14,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:06:14,577 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1225776221, now seen corresponding path program 3 times [2022-11-20 12:06:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008160785] [2022-11-20 12:06:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:14,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:14,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008160785] [2022-11-20 12:06:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008160785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:14,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:14,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:06:14,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837799194] [2022-11-20 12:06:14,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:14,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:06:14,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:14,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:06:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:06:14,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:14,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 245 transitions, 863 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:14,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:14,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:14,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:15,558 INFO L130 PetriNetUnfolder]: 158/2472 cut-off events. [2022-11-20 12:06:15,558 INFO L131 PetriNetUnfolder]: For 1092/1101 co-relation queries the response was YES. [2022-11-20 12:06:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 2472 events. 158/2472 cut-off events. For 1092/1101 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 17464 event pairs, 39 based on Foata normal form. 3/2301 useless extension candidates. Maximal degree in co-relation 3540. Up to 161 conditions per place. [2022-11-20 12:06:15,579 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 66 selfloop transitions, 21 changer transitions 3/275 dead transitions. [2022-11-20 12:06:15,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 275 transitions, 1225 flow [2022-11-20 12:06:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:06:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:06:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2022-11-20 12:06:15,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9068181818181819 [2022-11-20 12:06:15,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2022-11-20 12:06:15,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2022-11-20 12:06:15,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:15,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2022-11-20 12:06:15,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,593 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,593 INFO L175 Difference]: Start difference. First operand has 244 places, 245 transitions, 863 flow. Second operand 6 states and 1197 transitions. [2022-11-20 12:06:15,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 275 transitions, 1225 flow [2022-11-20 12:06:15,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 275 transitions, 1204 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 12:06:15,608 INFO L231 Difference]: Finished difference. Result has 247 places, 251 transitions, 975 flow [2022-11-20 12:06:15,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=975, PETRI_PLACES=247, PETRI_TRANSITIONS=251} [2022-11-20 12:06:15,612 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 45 predicate places. [2022-11-20 12:06:15,612 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 251 transitions, 975 flow [2022-11-20 12:06:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,613 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:15,613 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:15,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:06:15,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1919373709, now seen corresponding path program 4 times [2022-11-20 12:06:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:15,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061590132] [2022-11-20 12:06:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061590132] [2022-11-20 12:06:15,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061590132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360432182] [2022-11-20 12:06:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:06:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:15,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:15,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:06:15,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:06:15,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:15,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:06:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:16,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:16,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360432182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:16,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:16,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 12:06:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800263310] [2022-11-20 12:06:16,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:16,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:06:16,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:06:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:06:16,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:16,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 251 transitions, 975 flow. Second operand has 11 states, 11 states have (on average 193.45454545454547) internal successors, (2128), 11 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:16,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:16,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:16,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:17,303 INFO L130 PetriNetUnfolder]: 147/2516 cut-off events. [2022-11-20 12:06:17,303 INFO L131 PetriNetUnfolder]: For 1288/1293 co-relation queries the response was YES. [2022-11-20 12:06:17,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3601 conditions, 2516 events. 147/2516 cut-off events. For 1288/1293 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 17523 event pairs, 24 based on Foata normal form. 12/2360 useless extension candidates. Maximal degree in co-relation 3576. Up to 112 conditions per place. [2022-11-20 12:06:17,327 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 67 selfloop transitions, 29 changer transitions 4/285 dead transitions. [2022-11-20 12:06:17,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 285 transitions, 1356 flow [2022-11-20 12:06:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:06:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:06:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1780 transitions. [2022-11-20 12:06:17,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.898989898989899 [2022-11-20 12:06:17,334 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1780 transitions. [2022-11-20 12:06:17,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1780 transitions. [2022-11-20 12:06:17,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:17,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1780 transitions. [2022-11-20 12:06:17,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.77777777777777) internal successors, (1780), 9 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:17,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:17,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:17,366 INFO L175 Difference]: Start difference. First operand has 247 places, 251 transitions, 975 flow. Second operand 9 states and 1780 transitions. [2022-11-20 12:06:17,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 285 transitions, 1356 flow [2022-11-20 12:06:17,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 285 transitions, 1335 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-20 12:06:17,381 INFO L231 Difference]: Finished difference. Result has 258 places, 256 transitions, 1089 flow [2022-11-20 12:06:17,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1089, PETRI_PLACES=258, PETRI_TRANSITIONS=256} [2022-11-20 12:06:17,383 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 56 predicate places. [2022-11-20 12:06:17,383 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 256 transitions, 1089 flow [2022-11-20 12:06:17,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.45454545454547) internal successors, (2128), 11 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:17,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:17,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:17,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:17,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:17,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash -408082141, now seen corresponding path program 5 times [2022-11-20 12:06:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:17,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140353753] [2022-11-20 12:06:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:17,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:17,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140353753] [2022-11-20 12:06:17,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140353753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:17,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:17,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:06:17,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118462528] [2022-11-20 12:06:17,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:17,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:06:17,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:17,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:06:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:06:17,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:17,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 256 transitions, 1089 flow. Second operand has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:17,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:17,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:17,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:18,544 INFO L130 PetriNetUnfolder]: 169/3042 cut-off events. [2022-11-20 12:06:18,545 INFO L131 PetriNetUnfolder]: For 1996/1998 co-relation queries the response was YES. [2022-11-20 12:06:18,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4441 conditions, 3042 events. 169/3042 cut-off events. For 1996/1998 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 23000 event pairs, 28 based on Foata normal form. 6/2836 useless extension candidates. Maximal degree in co-relation 4411. Up to 136 conditions per place. [2022-11-20 12:06:18,582 INFO L137 encePairwiseOnDemand]: 214/220 looper letters, 87 selfloop transitions, 34 changer transitions 1/307 dead transitions. [2022-11-20 12:06:18,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 307 transitions, 1737 flow [2022-11-20 12:06:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:06:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:06:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2022-11-20 12:06:18,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9025974025974026 [2022-11-20 12:06:18,588 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2022-11-20 12:06:18,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2022-11-20 12:06:18,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:18,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2022-11-20 12:06:18,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,598 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,599 INFO L175 Difference]: Start difference. First operand has 258 places, 256 transitions, 1089 flow. Second operand 7 states and 1390 transitions. [2022-11-20 12:06:18,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 307 transitions, 1737 flow [2022-11-20 12:06:18,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 307 transitions, 1515 flow, removed 54 selfloop flow, removed 9 redundant places. [2022-11-20 12:06:18,622 INFO L231 Difference]: Finished difference. Result has 258 places, 268 transitions, 1197 flow [2022-11-20 12:06:18,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1197, PETRI_PLACES=258, PETRI_TRANSITIONS=268} [2022-11-20 12:06:18,624 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 56 predicate places. [2022-11-20 12:06:18,624 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 268 transitions, 1197 flow [2022-11-20 12:06:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:18,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:06:18,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1450219961, now seen corresponding path program 3 times [2022-11-20 12:06:18,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:18,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066565934] [2022-11-20 12:06:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:18,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:18,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066565934] [2022-11-20 12:06:18,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066565934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:18,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645916298] [2022-11-20 12:06:18,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:06:18,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:18,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:18,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:06:18,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:06:18,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:06:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:19,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:19,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645916298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:19,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:19,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 12:06:19,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331699473] [2022-11-20 12:06:19,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:06:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:06:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:06:19,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:19,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 268 transitions, 1197 flow. Second operand has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:19,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:19,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:19,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:20,638 INFO L130 PetriNetUnfolder]: 206/3802 cut-off events. [2022-11-20 12:06:20,639 INFO L131 PetriNetUnfolder]: For 2103/2117 co-relation queries the response was YES. [2022-11-20 12:06:20,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 3802 events. 206/3802 cut-off events. For 2103/2117 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 31576 event pairs, 21 based on Foata normal form. 9/3549 useless extension candidates. Maximal degree in co-relation 5287. Up to 108 conditions per place. [2022-11-20 12:06:20,675 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 61 selfloop transitions, 71 changer transitions 0/317 dead transitions. [2022-11-20 12:06:20,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 317 transitions, 1706 flow [2022-11-20 12:06:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:06:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 12:06:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2558 transitions. [2022-11-20 12:06:20,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8944055944055944 [2022-11-20 12:06:20,683 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2558 transitions. [2022-11-20 12:06:20,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2558 transitions. [2022-11-20 12:06:20,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:20,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2558 transitions. [2022-11-20 12:06:20,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 196.76923076923077) internal successors, (2558), 13 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:20,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 220.0) internal successors, (3080), 14 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) [2022-11-20 12:06:20,700 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 220.0) internal successors, (3080), 14 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) [2022-11-20 12:06:20,700 INFO L175 Difference]: Start difference. First operand has 258 places, 268 transitions, 1197 flow. Second operand 13 states and 2558 transitions. [2022-11-20 12:06:20,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 317 transitions, 1706 flow [2022-11-20 12:06:20,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 317 transitions, 1652 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-20 12:06:20,720 INFO L231 Difference]: Finished difference. Result has 271 places, 286 transitions, 1515 flow [2022-11-20 12:06:20,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1515, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-11-20 12:06:20,722 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 69 predicate places. [2022-11-20 12:06:20,722 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 1515 flow [2022-11-20 12:06:20,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:20,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:20,723 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:20,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:20,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:06:20,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2107569693, now seen corresponding path program 4 times [2022-11-20 12:06:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:20,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429254860] [2022-11-20 12:06:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:20,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:21,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429254860] [2022-11-20 12:06:21,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429254860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:21,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620563291] [2022-11-20 12:06:21,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:06:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:21,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:21,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:06:21,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:06:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:21,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:06:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:21,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:21,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620563291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:21,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:21,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 12:06:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499164781] [2022-11-20 12:06:21,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:21,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:06:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:06:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:06:21,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:21,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 1515 flow. Second operand has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:21,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:21,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:21,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:22,800 INFO L130 PetriNetUnfolder]: 191/3538 cut-off events. [2022-11-20 12:06:22,801 INFO L131 PetriNetUnfolder]: For 2465/2477 co-relation queries the response was YES. [2022-11-20 12:06:22,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5122 conditions, 3538 events. 191/3538 cut-off events. For 2465/2477 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 29040 event pairs, 35 based on Foata normal form. 9/3300 useless extension candidates. Maximal degree in co-relation 5092. Up to 156 conditions per place. [2022-11-20 12:06:22,841 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 60 selfloop transitions, 60 changer transitions 3/304 dead transitions. [2022-11-20 12:06:22,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 304 transitions, 1782 flow [2022-11-20 12:06:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:06:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:06:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1777 transitions. [2022-11-20 12:06:22,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8974747474747474 [2022-11-20 12:06:22,848 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1777 transitions. [2022-11-20 12:06:22,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1777 transitions. [2022-11-20 12:06:22,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:22,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1777 transitions. [2022-11-20 12:06:22,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.44444444444446) internal successors, (1777), 9 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:22,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:22,863 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:22,863 INFO L175 Difference]: Start difference. First operand has 271 places, 286 transitions, 1515 flow. Second operand 9 states and 1777 transitions. [2022-11-20 12:06:22,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 304 transitions, 1782 flow [2022-11-20 12:06:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 1762 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-20 12:06:22,894 INFO L231 Difference]: Finished difference. Result has 278 places, 280 transitions, 1569 flow [2022-11-20 12:06:22,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1569, PETRI_PLACES=278, PETRI_TRANSITIONS=280} [2022-11-20 12:06:22,895 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 76 predicate places. [2022-11-20 12:06:22,896 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 280 transitions, 1569 flow [2022-11-20 12:06:22,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:22,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:22,897 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:22,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:06:23,105 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -135938193, now seen corresponding path program 6 times [2022-11-20 12:06:23,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:23,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688351148] [2022-11-20 12:06:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:23,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:23,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688351148] [2022-11-20 12:06:23,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688351148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:23,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96634974] [2022-11-20 12:06:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:06:23,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:23,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:23,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:06:23,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 12:06:23,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:06:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:23,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:23,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96634974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:23,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:23,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 12:06:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055222204] [2022-11-20 12:06:23,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:06:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:06:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:06:23,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-20 12:06:23,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 280 transitions, 1569 flow. Second operand has 11 states, 11 states have (on average 193.36363636363637) internal successors, (2127), 11 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:23,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:23,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-20 12:06:23,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:25,023 INFO L130 PetriNetUnfolder]: 197/4020 cut-off events. [2022-11-20 12:06:25,023 INFO L131 PetriNetUnfolder]: For 3103/3111 co-relation queries the response was YES. [2022-11-20 12:06:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5861 conditions, 4020 events. 197/4020 cut-off events. For 3103/3111 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 34673 event pairs, 35 based on Foata normal form. 12/3751 useless extension candidates. Maximal degree in co-relation 5829. Up to 118 conditions per place. [2022-11-20 12:06:25,068 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 76 selfloop transitions, 72 changer transitions 1/330 dead transitions. [2022-11-20 12:06:25,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 330 transitions, 2282 flow [2022-11-20 12:06:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:06:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:06:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2356 transitions. [2022-11-20 12:06:25,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8924242424242425 [2022-11-20 12:06:25,077 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2356 transitions. [2022-11-20 12:06:25,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2356 transitions. [2022-11-20 12:06:25,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:25,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2356 transitions. [2022-11-20 12:06:25,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 196.33333333333334) internal successors, (2356), 12 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:25,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 220.0) internal successors, (2860), 13 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:25,095 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 220.0) internal successors, (2860), 13 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:25,095 INFO L175 Difference]: Start difference. First operand has 278 places, 280 transitions, 1569 flow. Second operand 12 states and 2356 transitions. [2022-11-20 12:06:25,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 330 transitions, 2282 flow [2022-11-20 12:06:25,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 330 transitions, 2120 flow, removed 21 selfloop flow, removed 9 redundant places. [2022-11-20 12:06:25,125 INFO L231 Difference]: Finished difference. Result has 278 places, 301 transitions, 1864 flow [2022-11-20 12:06:25,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1864, PETRI_PLACES=278, PETRI_TRANSITIONS=301} [2022-11-20 12:06:25,127 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 76 predicate places. [2022-11-20 12:06:25,128 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 301 transitions, 1864 flow [2022-11-20 12:06:25,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.36363636363637) internal successors, (2127), 11 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:25,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:25,129 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:25,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:25,337 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1564524413, now seen corresponding path program 1 times [2022-11-20 12:06:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:25,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870815503] [2022-11-20 12:06:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870815503] [2022-11-20 12:06:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870815503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996320875] [2022-11-20 12:06:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:27,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:27,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:27,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:06:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:27,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:06:27,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:29,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:31,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996320875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:31,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:31,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 58 [2022-11-20 12:06:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093634122] [2022-11-20 12:06:31,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:31,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 12:06:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 12:06:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3131, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 12:06:31,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 220 [2022-11-20 12:06:31,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 301 transitions, 1864 flow. Second operand has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:31,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:31,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 220 [2022-11-20 12:06:31,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:49,636 INFO L130 PetriNetUnfolder]: 6750/30009 cut-off events. [2022-11-20 12:06:49,637 INFO L131 PetriNetUnfolder]: For 9557/9584 co-relation queries the response was YES. [2022-11-20 12:06:49,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49757 conditions, 30009 events. 6750/30009 cut-off events. For 9557/9584 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 368209 event pairs, 1399 based on Foata normal form. 15/28279 useless extension candidates. Maximal degree in co-relation 49728. Up to 6444 conditions per place. [2022-11-20 12:06:49,895 INFO L137 encePairwiseOnDemand]: 187/220 looper letters, 463 selfloop transitions, 120 changer transitions 6/825 dead transitions. [2022-11-20 12:06:49,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 825 transitions, 4240 flow [2022-11-20 12:06:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 12:06:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-20 12:06:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 9536 transitions. [2022-11-20 12:06:49,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.688023088023088 [2022-11-20 12:06:49,912 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 9536 transitions. [2022-11-20 12:06:49,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 9536 transitions. [2022-11-20 12:06:49,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:49,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 9536 transitions. [2022-11-20 12:06:49,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 151.36507936507937) internal successors, (9536), 63 states have internal predecessors, (9536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:49,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 220.0) internal successors, (14080), 64 states have internal predecessors, (14080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:50,210 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 220.0) internal successors, (14080), 64 states have internal predecessors, (14080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:50,210 INFO L175 Difference]: Start difference. First operand has 278 places, 301 transitions, 1864 flow. Second operand 63 states and 9536 transitions. [2022-11-20 12:06:50,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 825 transitions, 4240 flow [2022-11-20 12:06:50,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 825 transitions, 4110 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-11-20 12:06:50,299 INFO L231 Difference]: Finished difference. Result has 375 places, 421 transitions, 2631 flow [2022-11-20 12:06:50,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2631, PETRI_PLACES=375, PETRI_TRANSITIONS=421} [2022-11-20 12:06:50,301 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 173 predicate places. [2022-11-20 12:06:50,301 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 421 transitions, 2631 flow [2022-11-20 12:06:50,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:50,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:50,304 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:50,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:50,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:50,515 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:06:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2000946413, now seen corresponding path program 2 times [2022-11-20 12:06:50,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:50,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010872177] [2022-11-20 12:06:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:50,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:51,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:51,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010872177] [2022-11-20 12:06:51,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010872177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:51,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667541016] [2022-11-20 12:06:51,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:06:51,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:51,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:51,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:51,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:06:51,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:06:51,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:51,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:06:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:53,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:55,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667541016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:55,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:55,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-11-20 12:06:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020536229] [2022-11-20 12:06:55,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:55,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:06:55,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:06:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:06:55,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 220 [2022-11-20 12:06:55,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 421 transitions, 2631 flow. Second operand has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:55,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:55,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 220 [2022-11-20 12:06:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:07:07,801 INFO L130 PetriNetUnfolder]: 6157/31607 cut-off events. [2022-11-20 12:07:07,801 INFO L131 PetriNetUnfolder]: For 63723/64115 co-relation queries the response was YES. [2022-11-20 12:07:08,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74953 conditions, 31607 events. 6157/31607 cut-off events. For 63723/64115 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 400475 event pairs, 1970 based on Foata normal form. 46/29647 useless extension candidates. Maximal degree in co-relation 74885. Up to 9424 conditions per place. [2022-11-20 12:07:08,211 INFO L137 encePairwiseOnDemand]: 194/220 looper letters, 357 selfloop transitions, 86 changer transitions 6/698 dead transitions. [2022-11-20 12:07:08,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 698 transitions, 5196 flow [2022-11-20 12:07:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:07:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 12:07:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6373 transitions. [2022-11-20 12:07:08,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7242045454545455 [2022-11-20 12:07:08,230 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6373 transitions. [2022-11-20 12:07:08,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6373 transitions. [2022-11-20 12:07:08,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:07:08,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6373 transitions. [2022-11-20 12:07:08,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 159.325) internal successors, (6373), 40 states have internal predecessors, (6373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:08,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 220.0) internal successors, (9020), 41 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:08,498 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 220.0) internal successors, (9020), 41 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:08,499 INFO L175 Difference]: Start difference. First operand has 375 places, 421 transitions, 2631 flow. Second operand 40 states and 6373 transitions. [2022-11-20 12:07:08,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 698 transitions, 5196 flow [2022-11-20 12:07:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 698 transitions, 5017 flow, removed 58 selfloop flow, removed 9 redundant places. [2022-11-20 12:07:08,825 INFO L231 Difference]: Finished difference. Result has 434 places, 497 transitions, 3420 flow [2022-11-20 12:07:08,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3420, PETRI_PLACES=434, PETRI_TRANSITIONS=497} [2022-11-20 12:07:08,828 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 232 predicate places. [2022-11-20 12:07:08,828 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 497 transitions, 3420 flow [2022-11-20 12:07:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:08,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:07:08,831 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:07:08,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:07:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:07:09,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:07:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:07:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2045398733, now seen corresponding path program 3 times [2022-11-20 12:07:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:07:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598720855] [2022-11-20 12:07:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:07:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:07:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:07:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:07:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598720855] [2022-11-20 12:07:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598720855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:07:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438182084] [2022-11-20 12:07:10,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:07:10,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:07:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:07:10,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:07:10,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:07:10,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:07:10,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:07:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:07:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:07:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:07:11,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:07:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:07:13,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438182084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:07:13,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:07:13,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-11-20 12:07:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918016836] [2022-11-20 12:07:13,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:07:13,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:07:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:07:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:07:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:07:13,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 220 [2022-11-20 12:07:13,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 497 transitions, 3420 flow. Second operand has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:13,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:07:13,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 220 [2022-11-20 12:07:13,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:07:29,983 INFO L130 PetriNetUnfolder]: 7143/38016 cut-off events. [2022-11-20 12:07:29,983 INFO L131 PetriNetUnfolder]: For 120442/121018 co-relation queries the response was YES. [2022-11-20 12:07:30,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98644 conditions, 38016 events. 7143/38016 cut-off events. For 120442/121018 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 502805 event pairs, 1746 based on Foata normal form. 130/35776 useless extension candidates. Maximal degree in co-relation 98548. Up to 10385 conditions per place. [2022-11-20 12:07:30,560 INFO L137 encePairwiseOnDemand]: 194/220 looper letters, 397 selfloop transitions, 144 changer transitions 6/796 dead transitions. [2022-11-20 12:07:30,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 796 transitions, 6869 flow [2022-11-20 12:07:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:07:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 12:07:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7168 transitions. [2022-11-20 12:07:30,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.724040404040404 [2022-11-20 12:07:30,589 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7168 transitions. [2022-11-20 12:07:30,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7168 transitions. [2022-11-20 12:07:30,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:07:30,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7168 transitions. [2022-11-20 12:07:30,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 159.2888888888889) internal successors, (7168), 45 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:30,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 220.0) internal successors, (10120), 46 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:30,642 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 220.0) internal successors, (10120), 46 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:30,643 INFO L175 Difference]: Start difference. First operand has 434 places, 497 transitions, 3420 flow. Second operand 45 states and 7168 transitions. [2022-11-20 12:07:30,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 796 transitions, 6869 flow [2022-11-20 12:07:31,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 796 transitions, 6429 flow, removed 218 selfloop flow, removed 5 redundant places. [2022-11-20 12:07:31,416 INFO L231 Difference]: Finished difference. Result has 493 places, 566 transitions, 4355 flow [2022-11-20 12:07:31,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4355, PETRI_PLACES=493, PETRI_TRANSITIONS=566} [2022-11-20 12:07:31,418 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 291 predicate places. [2022-11-20 12:07:31,418 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 566 transitions, 4355 flow [2022-11-20 12:07:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:31,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:07:31,421 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:07:31,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:07:31,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:07:31,634 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:07:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:07:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash -571332889, now seen corresponding path program 4 times [2022-11-20 12:07:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:07:31,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204943597] [2022-11-20 12:07:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:07:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:07:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:07:33,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:07:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204943597] [2022-11-20 12:07:33,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204943597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:07:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433703177] [2022-11-20 12:07:33,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:07:33,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:07:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:07:33,845 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:07:33,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:07:33,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:07:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:07:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 12:07:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:07:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:07:35,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:07:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:07:37,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433703177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:07:37,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:07:37,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 58 [2022-11-20 12:07:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534786997] [2022-11-20 12:07:37,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:07:37,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 12:07:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:07:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 12:07:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3132, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 12:07:37,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 220 [2022-11-20 12:07:37,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 566 transitions, 4355 flow. Second operand has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:37,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:07:37,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 220 [2022-11-20 12:07:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:08:06,170 INFO L130 PetriNetUnfolder]: 11462/49695 cut-off events. [2022-11-20 12:08:06,170 INFO L131 PetriNetUnfolder]: For 206279/207007 co-relation queries the response was YES. [2022-11-20 12:08:06,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144953 conditions, 49695 events. 11462/49695 cut-off events. For 206279/207007 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 669598 event pairs, 2779 based on Foata normal form. 182/46871 useless extension candidates. Maximal degree in co-relation 144836. Up to 11818 conditions per place. [2022-11-20 12:08:07,037 INFO L137 encePairwiseOnDemand]: 187/220 looper letters, 645 selfloop transitions, 192 changer transitions 6/1079 dead transitions. [2022-11-20 12:08:07,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1079 transitions, 9967 flow [2022-11-20 12:08:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 12:08:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-20 12:08:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 10398 transitions. [2022-11-20 12:08:07,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6849802371541502 [2022-11-20 12:08:07,060 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 10398 transitions. [2022-11-20 12:08:07,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 10398 transitions. [2022-11-20 12:08:07,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:08:07,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 10398 transitions. [2022-11-20 12:08:07,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 150.69565217391303) internal successors, (10398), 69 states have internal predecessors, (10398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:08:07,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 220.0) internal successors, (15400), 70 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:08:07,115 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 220.0) internal successors, (15400), 70 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:08:07,115 INFO L175 Difference]: Start difference. First operand has 493 places, 566 transitions, 4355 flow. Second operand 69 states and 10398 transitions. [2022-11-20 12:08:07,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1079 transitions, 9967 flow [2022-11-20 12:08:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1079 transitions, 9459 flow, removed 191 selfloop flow, removed 12 redundant places. [2022-11-20 12:08:09,022 INFO L231 Difference]: Finished difference. Result has 582 places, 688 transitions, 5908 flow [2022-11-20 12:08:09,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=5908, PETRI_PLACES=582, PETRI_TRANSITIONS=688} [2022-11-20 12:08:09,024 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 380 predicate places. [2022-11-20 12:08:09,024 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 688 transitions, 5908 flow [2022-11-20 12:08:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:08:09,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:08:09,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:08:09,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:08:09,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a92dcd7-32c1-4123-a93d-186b340e6536/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:08:09,229 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:08:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:08:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash 427921995, now seen corresponding path program 5 times [2022-11-20 12:08:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:08:09,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084019573] [2022-11-20 12:08:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:08:09,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:08:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat