./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:31:53,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:31:53,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:31:53,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:31:53,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:31:53,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:31:53,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:31:53,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:31:53,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:31:53,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:31:53,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:31:53,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:31:53,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:31:53,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:31:53,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:31:53,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:31:53,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:31:53,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:31:53,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:31:53,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:31:53,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:31:53,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:31:53,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:31:53,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:31:53,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:31:53,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:31:53,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:31:53,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:31:53,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:31:53,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:31:53,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:31:53,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:31:53,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:31:53,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:31:53,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:31:53,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:31:53,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:31:53,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:31:53,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:31:53,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:31:53,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:31:53,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:31:53,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:31:53,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:31:53,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:31:53,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:31:53,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:31:53,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:31:53,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:31:53,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:31:53,947 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:31:53,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:31:53,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:31:53,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:31:53,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:31:53,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:31:53,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:31:53,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:31:53,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:31:53,950 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:31:53,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:31:53,951 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:31:53,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:31:53,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:31:53,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:31:53,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:31:53,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:53,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:31:53,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:31:53,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:31:53,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:31:53,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:31:53,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:31:53,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:31:53,956 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:31:53,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:31:53,957 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 [2022-11-25 17:31:54,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:31:54,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:31:54,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:31:54,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:31:54,340 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:31:54,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2022-11-25 17:31:57,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:31:57,843 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:31:57,844 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2022-11-25 17:31:57,851 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/data/e7a13e09b/93ffeb3a128e49a79904777416feab32/FLAG62810472e [2022-11-25 17:31:57,869 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/data/e7a13e09b/93ffeb3a128e49a79904777416feab32 [2022-11-25 17:31:57,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:31:57,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:31:57,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:57,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:31:57,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:31:57,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:57" (1/1) ... [2022-11-25 17:31:57,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36021386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:57, skipping insertion in model container [2022-11-25 17:31:57,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:57" (1/1) ... [2022-11-25 17:31:57,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:31:57,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:31:58,151 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_62e9a656-83e7-44bf-bdb0-f19954359494/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c[1849,1862] [2022-11-25 17:31:58,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:58,173 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:31:58,214 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_62e9a656-83e7-44bf-bdb0-f19954359494/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c[1849,1862] [2022-11-25 17:31:58,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:58,241 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:31:58,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58 WrapperNode [2022-11-25 17:31:58,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:58,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:31:58,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:31:58,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:31:58,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,297 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-11-25 17:31:58,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:31:58,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:31:58,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:31:58,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:31:58,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,346 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:31:58,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:31:58,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:31:58,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:31:58,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (1/1) ... [2022-11-25 17:31:58,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:58,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:31:58,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:31:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:31:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:31:58,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:31:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:31:58,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:31:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:31:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:31:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:31:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:31:58,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:31:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:31:58,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:31:58,468 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:31:58,586 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:31:58,589 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:31:58,909 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:31:58,918 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:31:58,918 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:31:58,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:31:58 BoogieIcfgContainer [2022-11-25 17:31:58,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:31:58,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:31:58,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:31:58,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:31:58,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:31:57" (1/3) ... [2022-11-25 17:31:58,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f85b743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:31:58, skipping insertion in model container [2022-11-25 17:31:58,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:58" (2/3) ... [2022-11-25 17:31:58,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f85b743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:31:58, skipping insertion in model container [2022-11-25 17:31:58,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:31:58" (3/3) ... [2022-11-25 17:31:58,952 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2022-11-25 17:31:58,973 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:31:58,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:31:58,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:31:58,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:31:59,116 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:31:59,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-11-25 17:31:59,290 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2022-11-25 17:31:59,291 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:31:59,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-25 17:31:59,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-11-25 17:31:59,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2022-11-25 17:31:59,309 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:31:59,335 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 70 transitions, 152 flow [2022-11-25 17:31:59,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 70 transitions, 152 flow [2022-11-25 17:31:59,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 70 transitions, 152 flow [2022-11-25 17:31:59,388 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-11-25 17:31:59,389 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:31:59,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 6/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-25 17:31:59,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 252 [2022-11-25 17:32:03,587 INFO L134 LiptonReduction]: Checked pairs total: 320 [2022-11-25 17:32:03,587 INFO L136 LiptonReduction]: Total number of compositions: 70 [2022-11-25 17:32:03,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:32:03,636 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;@2b3cb7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:32:03,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:32:03,651 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2022-11-25 17:32:03,651 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:32:03,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:03,654 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:03,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 702658161, now seen corresponding path program 1 times [2022-11-25 17:32:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:03,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502231781] [2022-11-25 17:32:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:04,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502231781] [2022-11-25 17:32:04,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502231781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:04,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:04,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071153455] [2022-11-25 17:32:04,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:04,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:04,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 151 [2022-11-25 17:32:04,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:04,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 151 [2022-11-25 17:32:04,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:04,526 INFO L130 PetriNetUnfolder]: 41/77 cut-off events. [2022-11-25 17:32:04,528 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 17:32:04,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 77 events. 41/77 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 169 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2022-11-25 17:32:04,532 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2022-11-25 17:32:04,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 113 flow [2022-11-25 17:32:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-25 17:32:04,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4900662251655629 [2022-11-25 17:32:04,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-25 17:32:04,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-25 17:32:04,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:04,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-25 17:32:04,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 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) [2022-11-25 17:32:04,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 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) [2022-11-25 17:32:04,583 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 222 transitions. [2022-11-25 17:32:04,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 113 flow [2022-11-25 17:32:04,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:32:04,592 INFO L231 Difference]: Finished difference. Result has 17 places, 15 transitions, 49 flow [2022-11-25 17:32:04,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=17, PETRI_TRANSITIONS=15} [2022-11-25 17:32:04,602 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2022-11-25 17:32:04,603 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 15 transitions, 49 flow [2022-11-25 17:32:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:04,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:04,604 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:04,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:32:04,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 911259150, now seen corresponding path program 1 times [2022-11-25 17:32:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:04,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762525804] [2022-11-25 17:32:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:04,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:04,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762525804] [2022-11-25 17:32:04,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762525804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:04,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:04,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:32:04,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437699084] [2022-11-25 17:32:04,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:04,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:32:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:32:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:32:05,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2022-11-25 17:32:05,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 49 flow. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:05,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2022-11-25 17:32:05,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:05,136 INFO L130 PetriNetUnfolder]: 35/71 cut-off events. [2022-11-25 17:32:05,137 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:32:05,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 71 events. 35/71 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 6 based on Foata normal form. 6/77 useless extension candidates. Maximal degree in co-relation 55. Up to 45 conditions per place. [2022-11-25 17:32:05,138 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 15 selfloop transitions, 3 changer transitions 10/28 dead transitions. [2022-11-25 17:32:05,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 28 transitions, 135 flow [2022-11-25 17:32:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:32:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:32:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2022-11-25 17:32:05,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4470198675496689 [2022-11-25 17:32:05,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 270 transitions. [2022-11-25 17:32:05,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 270 transitions. [2022-11-25 17:32:05,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:05,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 270 transitions. [2022-11-25 17:32:05,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,146 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 49 flow. Second operand 4 states and 270 transitions. [2022-11-25 17:32:05,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 28 transitions, 135 flow [2022-11-25 17:32:05,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:05,148 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 59 flow [2022-11-25 17:32:05,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-11-25 17:32:05,149 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 2 predicate places. [2022-11-25 17:32:05,149 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 59 flow [2022-11-25 17:32:05,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:05,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:05,150 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:05,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:32:05,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1674636044, now seen corresponding path program 2 times [2022-11-25 17:32:05,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:05,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62479619] [2022-11-25 17:32:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62479619] [2022-11-25 17:32:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62479619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:05,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350231966] [2022-11-25 17:32:05,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:05,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:05,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:32:05,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:32:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:05,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:32:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:05,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:05,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350231966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:05,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:32:05,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-25 17:32:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827768757] [2022-11-25 17:32:05,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:32:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:32:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:32:06,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2022-11-25 17:32:06,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 59 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:06,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2022-11-25 17:32:06,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:06,250 INFO L130 PetriNetUnfolder]: 34/63 cut-off events. [2022-11-25 17:32:06,250 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 17:32:06,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 63 events. 34/63 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 103 event pairs, 4 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 49. Up to 39 conditions per place. [2022-11-25 17:32:06,251 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 22 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2022-11-25 17:32:06,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 152 flow [2022-11-25 17:32:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2022-11-25 17:32:06,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2022-11-25 17:32:06,255 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2022-11-25 17:32:06,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2022-11-25 17:32:06,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:06,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2022-11-25 17:32:06,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,260 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 59 flow. Second operand 5 states and 330 transitions. [2022-11-25 17:32:06,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 152 flow [2022-11-25 17:32:06,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 144 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:32:06,263 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 88 flow [2022-11-25 17:32:06,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2022-11-25 17:32:06,264 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2022-11-25 17:32:06,265 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 88 flow [2022-11-25 17:32:06,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:06,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:06,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:06,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:06,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:06,473 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1932032632, now seen corresponding path program 1 times [2022-11-25 17:32:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:06,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468232254] [2022-11-25 17:32:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:06,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468232254] [2022-11-25 17:32:06,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468232254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389934547] [2022-11-25 17:32:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:06,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:06,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:06,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:32:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:32:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:07,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389934547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:07,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:32:07,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-25 17:32:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987894186] [2022-11-25 17:32:07,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:07,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:32:07,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:32:07,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:32:07,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2022-11-25 17:32:07,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:07,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:07,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2022-11-25 17:32:07,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:07,259 INFO L130 PetriNetUnfolder]: 40/73 cut-off events. [2022-11-25 17:32:07,259 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-11-25 17:32:07,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 73 events. 40/73 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 134 event pairs, 4 based on Foata normal form. 4/77 useless extension candidates. Maximal degree in co-relation 113. Up to 61 conditions per place. [2022-11-25 17:32:07,261 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 21 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2022-11-25 17:32:07,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 175 flow [2022-11-25 17:32:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2022-11-25 17:32:07,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43178807947019865 [2022-11-25 17:32:07,264 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 326 transitions. [2022-11-25 17:32:07,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 326 transitions. [2022-11-25 17:32:07,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:07,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 326 transitions. [2022-11-25 17:32:07,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:07,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:07,269 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:07,269 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 88 flow. Second operand 5 states and 326 transitions. [2022-11-25 17:32:07,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 175 flow [2022-11-25 17:32:07,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:07,272 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 122 flow [2022-11-25 17:32:07,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2022-11-25 17:32:07,273 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 10 predicate places. [2022-11-25 17:32:07,274 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 122 flow [2022-11-25 17:32:07,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:07,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:07,275 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:07,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:07,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1589205667, now seen corresponding path program 1 times [2022-11-25 17:32:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:07,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327988063] [2022-11-25 17:32:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327988063] [2022-11-25 17:32:08,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327988063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748357118] [2022-11-25 17:32:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:08,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:08,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:32:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:32:08,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:08,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748357118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:08,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:32:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 17:32:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629739452] [2022-11-25 17:32:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:08,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:08,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:32:08,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 151 [2022-11-25 17:32:08,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:08,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:08,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 151 [2022-11-25 17:32:08,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:09,028 INFO L130 PetriNetUnfolder]: 24/47 cut-off events. [2022-11-25 17:32:09,029 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-11-25 17:32:09,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 47 events. 24/47 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 4/51 useless extension candidates. Maximal degree in co-relation 98. Up to 43 conditions per place. [2022-11-25 17:32:09,031 INFO L137 encePairwiseOnDemand]: 148/151 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-11-25 17:32:09,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 133 flow [2022-11-25 17:32:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2022-11-25 17:32:09,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47240618101545256 [2022-11-25 17:32:09,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2022-11-25 17:32:09,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2022-11-25 17:32:09,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:09,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2022-11-25 17:32:09,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:09,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 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) [2022-11-25 17:32:09,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 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) [2022-11-25 17:32:09,039 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 122 flow. Second operand 3 states and 214 transitions. [2022-11-25 17:32:09,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 133 flow [2022-11-25 17:32:09,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 109 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 17:32:09,047 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 75 flow [2022-11-25 17:32:09,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2022-11-25 17:32:09,052 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 6 predicate places. [2022-11-25 17:32:09,052 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 75 flow [2022-11-25 17:32:09,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:09,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:09,053 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:09,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:09,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:09,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash -664568163, now seen corresponding path program 2 times [2022-11-25 17:32:09,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:09,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68687833] [2022-11-25 17:32:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:09,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68687833] [2022-11-25 17:32:09,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68687833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509165757] [2022-11-25 17:32:09,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:09,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:09,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:09,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:32:09,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:32:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:32:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:22,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:29,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509165757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:29,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:32:29,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2022-11-25 17:32:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701100800] [2022-11-25 17:32:29,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:29,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:32:29,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:32:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=151, Unknown=5, NotChecked=0, Total=210 [2022-11-25 17:32:31,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:34,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:34,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 151 [2022-11-25 17:32:34,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 75 flow. Second operand has 15 states, 15 states have (on average 60.333333333333336) internal successors, (905), 15 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:34,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:34,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 151 [2022-11-25 17:32:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:36,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:44,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:46,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:48,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:50,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:58,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:00,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:05,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:21,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:23,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:25,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:28,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:30,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:32,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:34,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:37,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:38,633 INFO L130 PetriNetUnfolder]: 68/139 cut-off events. [2022-11-25 17:33:38,634 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-11-25 17:33:38,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 139 events. 68/139 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 399 event pairs, 0 based on Foata normal form. 4/143 useless extension candidates. Maximal degree in co-relation 244. Up to 45 conditions per place. [2022-11-25 17:33:38,635 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 39 selfloop transitions, 16 changer transitions 10/65 dead transitions. [2022-11-25 17:33:38,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 377 flow [2022-11-25 17:33:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:33:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:33:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 821 transitions. [2022-11-25 17:33:38,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41823739174732555 [2022-11-25 17:33:38,640 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 821 transitions. [2022-11-25 17:33:38,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 821 transitions. [2022-11-25 17:33:38,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:38,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 821 transitions. [2022-11-25 17:33:38,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.15384615384615) internal successors, (821), 13 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:38,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:38,668 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:38,668 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 75 flow. Second operand 13 states and 821 transitions. [2022-11-25 17:33:38,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 377 flow [2022-11-25 17:33:38,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 65 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:33:38,673 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 201 flow [2022-11-25 17:33:38,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=201, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2022-11-25 17:33:38,678 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 20 predicate places. [2022-11-25 17:33:38,678 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 201 flow [2022-11-25 17:33:38,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 60.333333333333336) internal successors, (905), 15 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:38,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:38,679 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:38,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:38,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:33:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash 956469548, now seen corresponding path program 3 times [2022-11-25 17:33:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:38,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782135232] [2022-11-25 17:33:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782135232] [2022-11-25 17:33:39,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782135232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191920963] [2022-11-25 17:33:39,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:33:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:39,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:39,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:33:47,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:33:47,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:33:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:53,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:55,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191920963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:55,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:33:55,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:33:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945450387] [2022-11-25 17:33:55,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:33:55,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:33:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=98, Unknown=3, NotChecked=0, Total=132 [2022-11-25 17:33:56,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:59,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:01,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:01,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 151 [2022-11-25 17:34:01,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 201 flow. Second operand has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:01,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:01,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 151 [2022-11-25 17:34:01,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:08,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:10,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:14,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:16,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:16,581 INFO L130 PetriNetUnfolder]: 110/223 cut-off events. [2022-11-25 17:34:16,581 INFO L131 PetriNetUnfolder]: For 539/539 co-relation queries the response was YES. [2022-11-25 17:34:16,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 223 events. 110/223 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 794 event pairs, 2 based on Foata normal form. 13/236 useless extension candidates. Maximal degree in co-relation 914. Up to 79 conditions per place. [2022-11-25 17:34:16,584 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 37 selfloop transitions, 18 changer transitions 16/71 dead transitions. [2022-11-25 17:34:16,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 581 flow [2022-11-25 17:34:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:34:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:34:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 698 transitions. [2022-11-25 17:34:16,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4202287778446719 [2022-11-25 17:34:16,589 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 698 transitions. [2022-11-25 17:34:16,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 698 transitions. [2022-11-25 17:34:16,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:16,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 698 transitions. [2022-11-25 17:34:16,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 63.45454545454545) internal successors, (698), 11 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:16,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:16,597 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:16,597 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 201 flow. Second operand 11 states and 698 transitions. [2022-11-25 17:34:16,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 581 flow [2022-11-25 17:34:16,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 71 transitions, 472 flow, removed 48 selfloop flow, removed 6 redundant places. [2022-11-25 17:34:16,604 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 253 flow [2022-11-25 17:34:16,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=253, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-11-25 17:34:16,606 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 28 predicate places. [2022-11-25 17:34:16,606 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 253 flow [2022-11-25 17:34:16,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.5) internal successors, (726), 12 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:16,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:16,607 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:16,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:16,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:16,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:34:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1819506600, now seen corresponding path program 4 times [2022-11-25 17:34:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:16,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836401620] [2022-11-25 17:34:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:21,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836401620] [2022-11-25 17:34:21,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836401620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:21,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344029578] [2022-11-25 17:34:21,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:34:21,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:21,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:21,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:34:30,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:34:30,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:34:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:44,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:35:49,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344029578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:49,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:35:49,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 15 [2022-11-25 17:35:49,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082623217] [2022-11-25 17:35:49,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:49,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:35:49,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:49,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:35:49,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=171, Unknown=21, NotChecked=0, Total=240 [2022-11-25 17:35:52,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:55,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:58,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:58,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 151 [2022-11-25 17:35:58,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 253 flow. Second operand has 16 states, 16 states have (on average 60.375) internal successors, (966), 16 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:58,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:58,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 151 [2022-11-25 17:35:58,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:00,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:36:59,142 WARN L233 SmtUtils]: Spent 53.43s on a formula simplification. DAG size of input: 79 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:37:01,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:37:04,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:37:06,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:04,747 WARN L233 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 76 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:39:06,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:08,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:10,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:13,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:15,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:17,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:19,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:21,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:23,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:25,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:27,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:29,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:31,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:34,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:36,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:38,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:40,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:42,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:39:44,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:05,911 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:40:08,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:10,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:12,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:14,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:16,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:18,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:20,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:22,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:24,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:26,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:28,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:31,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:33,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:35,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:37,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:40:39,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:32,001 WARN L233 SmtUtils]: Spent 2.66m on a formula simplification. DAG size of input: 103 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:43:34,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:36,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:38,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:40,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:42,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:44,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:46,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:48,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:50,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:52,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:54,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:56,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:43:58,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:00,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:02,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:04,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:06,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:08,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:10,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:52,104 WARN L233 SmtUtils]: Spent 24.79s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:44:54,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:56,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:44:59,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:01,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:03,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:05,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:07,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:09,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:11,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:13,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:15,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:17,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:20,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:22,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:24,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:45:25,037 INFO L130 PetriNetUnfolder]: 111/219 cut-off events. [2022-11-25 17:45:25,038 INFO L131 PetriNetUnfolder]: For 719/719 co-relation queries the response was YES. [2022-11-25 17:45:25,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 219 events. 111/219 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 3 based on Foata normal form. 6/225 useless extension candidates. Maximal degree in co-relation 891. Up to 129 conditions per place. [2022-11-25 17:45:25,041 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 37 selfloop transitions, 29 changer transitions 0/66 dead transitions. [2022-11-25 17:45:25,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 510 flow [2022-11-25 17:45:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:45:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:45:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 746 transitions. [2022-11-25 17:45:25,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4116997792494481 [2022-11-25 17:45:25,045 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 746 transitions. [2022-11-25 17:45:25,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 746 transitions. [2022-11-25 17:45:25,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:25,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 746 transitions. [2022-11-25 17:45:25,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 62.166666666666664) internal successors, (746), 12 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:25,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 151.0) internal successors, (1963), 13 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:25,052 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 151.0) internal successors, (1963), 13 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:25,053 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 253 flow. Second operand 12 states and 746 transitions. [2022-11-25 17:45:25,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 510 flow [2022-11-25 17:45:25,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 482 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-11-25 17:45:25,060 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 406 flow [2022-11-25 17:45:25,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=406, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2022-11-25 17:45:25,061 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 37 predicate places. [2022-11-25 17:45:25,061 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 406 flow [2022-11-25 17:45:25,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.375) internal successors, (966), 16 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:25,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:25,062 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:25,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:25,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:45:25,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:45:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1748008200, now seen corresponding path program 5 times [2022-11-25 17:45:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289950380] [2022-11-25 17:45:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289950380] [2022-11-25 17:45:27,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289950380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611566360] [2022-11-25 17:45:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:45:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:27,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:27,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62e9a656-83e7-44bf-bdb0-f19954359494/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:45:34,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:45:34,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:45:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:22,847 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (- c_~x1~0)) (.cse4 (mod c_~x2~0 4294967296)) (.cse1 (mod c_~x1~0 4294967296))) (let ((.cse3 (* 4294967296 (div (+ (- 1) (- .cse1)) 4294967296))) (.cse2 (- .cse4)) (.cse5 (div .cse6 (- 2))) (.cse0 (mod (div .cse6 (- 4)) 4294967296))) (and (<= (+ .cse0 1) .cse1) (= (mod c_~x2~0 2) 0) (<= (+ (* (div (+ (- 1) .cse2) 4294967296) 4294967296) .cse3 (* (div (+ .cse2 .cse0) 4294967296) 4294967296) 12884901888) .cse4) (= (mod .cse5 2) 0) (= (mod c_~x1~0 2) 0) (<= (+ (* (div (+ .cse0 (- 4294967295)) 4294967296) 4294967296) .cse3 12884901888 (* 4294967296 (div (+ .cse2 (mod .cse5 4294967296)) 4294967296))) .cse4) (= (mod (div (- c_~x2~0) (- 2)) 4294967296) .cse0)))) is different from false [2022-11-25 17:47:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:07,674 INFO L328 TraceCheckSpWp]: Computing backward predicates...