./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:06:14,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:06:15,014 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:06:15,020 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:06:15,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:06:15,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:06:15,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:06:15,049 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:06:15,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:06:15,050 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:06:15,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:06:15,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:06:15,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:06:15,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:06:15,053 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:06:15,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:06:15,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:06:15,055 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:06:15,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:06:15,056 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:06:15,056 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:06:15,057 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:06:15,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:06:15,058 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:06:15,058 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:06:15,059 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:06:15,059 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:06:15,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:06:15,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:06:15,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:06:15,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:06:15,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:06:15,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:06:15,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:06:15,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:06:15,064 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:06:15,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:06:15,065 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:06:15,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:06:15,066 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:06:15,067 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:06:15,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:06:15,068 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2023-11-26 12:06:15,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:06:15,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:06:15,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:06:15,442 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:06:15,443 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:06:15,444 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/fib_safe-12.i [2023-11-26 12:06:18,605 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:06:18,890 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:06:18,901 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/sv-benchmarks/c/pthread/fib_safe-12.i [2023-11-26 12:06:18,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/data/693d734ec/ace08fe7cf4a4867abc38a014ed0a797/FLAGf3ee20710 [2023-11-26 12:06:18,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/data/693d734ec/ace08fe7cf4a4867abc38a014ed0a797 [2023-11-26 12:06:18,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:06:18,951 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:06:18,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:06:18,953 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:06:18,958 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:06:18,959 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:06:18" (1/1) ... [2023-11-26 12:06:18,960 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e73bcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:18, skipping insertion in model container [2023-11-26 12:06:18,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:06:18" (1/1) ... [2023-11-26 12:06:19,014 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:06:19,384 WARN L240 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_21462ef8-28b3-47b5-a129-7b1ebfddf813/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2023-11-26 12:06:19,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:06:19,421 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:06:19,483 WARN L240 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_21462ef8-28b3-47b5-a129-7b1ebfddf813/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2023-11-26 12:06:19,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:06:19,537 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:06:19,538 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:06:19,546 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:06:19,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19 WrapperNode [2023-11-26 12:06:19,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:06:19,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:06:19,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:06:19,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:06:19,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,594 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,632 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-26 12:06:19,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:06:19,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:06:19,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:06:19,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:06:19,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,682 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 12:06:19,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,688 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:06:19,715 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:06:19,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:06:19,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:06:19,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (1/1) ... [2023-11-26 12:06:19,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:06:19,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:19,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:06:19,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:06:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 12:06:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 12:06:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 12:06:19,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 12:06:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:06:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:06:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:06:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:06:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:06:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:06:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:06:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:06:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:06:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:06:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:06:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:06:19,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:06:19,801 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:06:19,990 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:06:19,992 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:06:20,167 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:06:20,338 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:06:20,338 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 12:06:20,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:20 BoogieIcfgContainer [2023-11-26 12:06:20,340 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:06:20,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:06:20,345 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:06:20,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:06:20,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:06:18" (1/3) ... [2023-11-26 12:06:20,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340f6f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:06:20, skipping insertion in model container [2023-11-26 12:06:20,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:19" (2/3) ... [2023-11-26 12:06:20,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340f6f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:06:20, skipping insertion in model container [2023-11-26 12:06:20,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:20" (3/3) ... [2023-11-26 12:06:20,353 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2023-11-26 12:06:20,364 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:06:20,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:06:20,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:06:20,379 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:06:20,432 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 12:06:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-26 12:06:20,543 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-26 12:06:20,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 12:06:20,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-26 12:06:20,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-26 12:06:20,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2023-11-26 12:06:20,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:06:20,572 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=LoopHeads, 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;@d3fd2ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:06:20,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 12:06:20,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:06:20,584 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-26 12:06:20,584 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 12:06:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:20,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:20,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:06:20,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2023-11-26 12:06:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:20,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965102659] [2023-11-26 12:06:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:20,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:20,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965102659] [2023-11-26 12:06:20,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965102659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:21,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:21,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:06:21,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660683537] [2023-11-26 12:06:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:21,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:06:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:06:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:06:21,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-26 12:06:21,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:21,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-26 12:06:21,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:21,149 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2023-11-26 12:06:21,149 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 12:06:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2023-11-26 12:06:21,156 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-11-26 12:06:21,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2023-11-26 12:06:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:06:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:06:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-26 12:06:21,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-26 12:06:21,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-26 12:06:21,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-26 12:06:21,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:21,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-26 12:06:21,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,183 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2023-11-26 12:06:21,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2023-11-26 12:06:21,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:06:21,188 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2023-11-26 12:06:21,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-26 12:06:21,193 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-11-26 12:06:21,194 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2023-11-26 12:06:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:21,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:21,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:06:21,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:06:21,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2023-11-26 12:06:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:21,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098668524] [2023-11-26 12:06:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:21,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098668524] [2023-11-26 12:06:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098668524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366579404] [2023-11-26 12:06:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:21,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:21,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:21,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:06:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:21,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:06:21,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:21,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:21,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366579404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:21,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:21,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 12:06:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715557087] [2023-11-26 12:06:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:06:21,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:06:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:06:21,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-26 12:06:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:21,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-26 12:06:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:21,760 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2023-11-26 12:06:21,763 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:06:21,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 802 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2023-11-26 12:06:21,775 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-26 12:06:21,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2023-11-26 12:06:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:06:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:06:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-26 12:06:21,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2023-11-26 12:06:21,783 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-26 12:06:21,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-26 12:06:21,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:21,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-26 12:06:21,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,795 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2023-11-26 12:06:21,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2023-11-26 12:06:21,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:06:21,801 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2023-11-26 12:06:21,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-26 12:06:21,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-26 12:06:21,806 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2023-11-26 12:06:21,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:21,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:21,808 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:21,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:22,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:22,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:06:22,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2023-11-26 12:06:22,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:22,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150539552] [2023-11-26 12:06:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:22,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:22,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:22,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150539552] [2023-11-26 12:06:22,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150539552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:22,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884421121] [2023-11-26 12:06:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:06:22,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:22,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:22,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:06:22,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:06:22,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:22,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:06:22,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:22,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884421121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:22,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-26 12:06:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673257006] [2023-11-26 12:06:22,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:22,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:06:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:06:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:06:22,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-26 12:06:22,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:22,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:22,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-26 12:06:22,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:22,763 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2023-11-26 12:06:22,764 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-26 12:06:22,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1199 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2023-11-26 12:06:22,769 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-11-26 12:06:22,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2023-11-26 12:06:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:06:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 12:06:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2023-11-26 12:06:22,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2023-11-26 12:06:22,772 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 235 transitions. [2023-11-26 12:06:22,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 235 transitions. [2023-11-26 12:06:22,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:22,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 235 transitions. [2023-11-26 12:06:22,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:22,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:22,778 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:22,778 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2023-11-26 12:06:22,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2023-11-26 12:06:22,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 12:06:22,784 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2023-11-26 12:06:22,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2023-11-26 12:06:22,786 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-11-26 12:06:22,786 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2023-11-26 12:06:22,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:22,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:22,787 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:22,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:22,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:06:22,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2023-11-26 12:06:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945426139] [2023-11-26 12:06:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945426139] [2023-11-26 12:06:23,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945426139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:23,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146839613] [2023-11-26 12:06:23,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:06:23,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:23,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:23,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:23,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:06:23,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-26 12:06:23,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:23,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 12:06:23,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:23,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:23,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146839613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:23,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:23,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-26 12:06:23,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53730426] [2023-11-26 12:06:23,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:06:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:06:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:06:23,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-26 12:06:23,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:23,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:23,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-26 12:06:23,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:24,273 INFO L124 PetriNetUnfolderBase]: 475/763 cut-off events. [2023-11-26 12:06:24,273 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-26 12:06:24,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 763 events. 475/763 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1999 event pairs, 20 based on Foata normal form. 108/857 useless extension candidates. Maximal degree in co-relation 2216. Up to 190 conditions per place. [2023-11-26 12:06:24,283 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 146 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2023-11-26 12:06:24,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 179 transitions, 868 flow [2023-11-26 12:06:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 12:06:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 12:06:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 469 transitions. [2023-11-26 12:06:24,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6738505747126436 [2023-11-26 12:06:24,287 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 469 transitions. [2023-11-26 12:06:24,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 469 transitions. [2023-11-26 12:06:24,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:24,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 469 transitions. [2023-11-26 12:06:24,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:24,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:24,294 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:24,294 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 469 transitions. [2023-11-26 12:06:24,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 179 transitions, 868 flow [2023-11-26 12:06:24,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 179 transitions, 796 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-26 12:06:24,310 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2023-11-26 12:06:24,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2023-11-26 12:06:24,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2023-11-26 12:06:24,312 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2023-11-26 12:06:24,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:24,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:24,313 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:24,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:24,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:24,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:06:24,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1697966227, now seen corresponding path program 4 times [2023-11-26 12:06:24,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:24,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246071370] [2023-11-26 12:06:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:25,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:25,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246071370] [2023-11-26 12:06:25,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246071370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:25,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982743923] [2023-11-26 12:06:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:06:25,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:25,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:25,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:25,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:06:25,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:06:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:25,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 12:06:25,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:25,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982743923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:25,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:25,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 29 [2023-11-26 12:06:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690421315] [2023-11-26 12:06:25,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 12:06:25,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 12:06:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-26 12:06:25,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-26 12:06:25,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 29 states, 29 states have (on average 13.275862068965518) internal successors, (385), 29 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:25,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:25,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-26 12:06:25,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:06:26,265 INFO L124 PetriNetUnfolderBase]: 547/871 cut-off events. [2023-11-26 12:06:26,265 INFO L125 PetriNetUnfolderBase]: For 9333/9333 co-relation queries the response was YES. [2023-11-26 12:06:26,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 871 events. 547/871 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2265 event pairs, 20 based on Foata normal form. 36/893 useless extension candidates. Maximal degree in co-relation 2648. Up to 184 conditions per place. [2023-11-26 12:06:26,278 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 170 selfloop transitions, 27 changer transitions 0/207 dead transitions. [2023-11-26 12:06:26,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 207 transitions, 1028 flow [2023-11-26 12:06:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 12:06:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 12:06:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 537 transitions. [2023-11-26 12:06:26,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6613300492610837 [2023-11-26 12:06:26,282 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 537 transitions. [2023-11-26 12:06:26,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 537 transitions. [2023-11-26 12:06:26,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:06:26,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 537 transitions. [2023-11-26 12:06:26,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 19.178571428571427) internal successors, (537), 28 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:26,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 29.0) internal successors, (841), 29 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:26,288 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 29.0) internal successors, (841), 29 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:26,288 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 537 transitions. [2023-11-26 12:06:26,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 207 transitions, 1028 flow [2023-11-26 12:06:26,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 207 transitions, 924 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-11-26 12:06:26,310 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2023-11-26 12:06:26,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=51} [2023-11-26 12:06:26,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-11-26 12:06:26,311 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2023-11-26 12:06:26,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.275862068965518) internal successors, (385), 29 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:26,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:06:26,312 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:26,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:26,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:26,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 12:06:26,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1605336429, now seen corresponding path program 5 times [2023-11-26 12:06:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:26,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968327274] [2023-11-26 12:06:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:29,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:29,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968327274] [2023-11-26 12:06:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968327274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029245115] [2023-11-26 12:06:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:06:29,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:29,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:29,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21462ef8-28b3-47b5-a129-7b1ebfddf813/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:06:29,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-11-26 12:06:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:29,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 89 conjunts are in the unsatisfiable core [2023-11-26 12:06:29,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:31,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:35,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029245115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:35,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:35,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2023-11-26 12:06:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560658628] [2023-11-26 12:06:35,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-26 12:06:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-26 12:06:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=8123, Unknown=0, NotChecked=0, Total=9506 [2023-11-26 12:06:35,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-26 12:06:35,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:35,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:06:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-26 12:06:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand