./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro --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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- 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-8393723 [2022-11-18 18:42:33,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:42:33,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:42:33,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:42:33,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:42:33,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:42:33,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:42:33,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:42:33,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:42:33,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:42:33,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:42:33,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:42:33,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:42:33,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:42:33,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:42:33,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:42:33,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:42:33,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:42:33,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:42:33,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:42:33,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:42:33,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:42:33,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:42:33,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:42:33,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:42:33,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:42:33,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:42:33,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:42:33,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:42:33,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:42:33,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:42:33,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:42:33,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:42:33,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:42:33,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:42:33,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:42:33,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:42:33,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:42:33,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:42:33,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:42:33,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:42:33,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:42:33,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:42:33,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:42:33,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:42:33,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:42:33,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:42:33,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:42:33,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:42:33,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:42:33,933 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:42:33,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:42:33,934 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:42:33,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:42:33,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:42:33,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:42:33,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:42:33,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:42:33,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:42:33,936 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:42:33,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:42:33,937 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:42:33,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:42:33,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:42:33,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:42:33,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:42:33,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:42:33,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:42:33,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:42:33,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:42:33,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:42:33,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:42:33,940 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:42:33,940 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:42:33,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:42:33,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-11-18 18:42:34,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:42:34,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:42:34,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:42:34,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:42:34,251 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:42:34,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-11-18 18:42:34,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/data/48354cb55/0275f6f411e54630898077d9d3398380/FLAG0c943a709 [2022-11-18 18:42:34,749 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:42:34,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-11-18 18:42:34,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/data/48354cb55/0275f6f411e54630898077d9d3398380/FLAG0c943a709 [2022-11-18 18:42:35,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/data/48354cb55/0275f6f411e54630898077d9d3398380 [2022-11-18 18:42:35,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:42:35,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:42:35,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:42:35,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:42:35,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:42:35,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e592eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35, skipping insertion in model container [2022-11-18 18:42:35,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:42:35,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:42:35,387 WARN L234 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_9a470435-5334-48b9-8f14-de954cbebbee/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-11-18 18:42:35,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:42:35,400 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:42:35,427 WARN L234 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_9a470435-5334-48b9-8f14-de954cbebbee/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-11-18 18:42:35,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:42:35,442 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:42:35,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35 WrapperNode [2022-11-18 18:42:35,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:42:35,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:42:35,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:42:35,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:42:35,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,501 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-18 18:42:35,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:42:35,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:42:35,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:42:35,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:42:35,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:42:35,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:42:35,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:42:35,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:42:35,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (1/1) ... [2022-11-18 18:42:35,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:42:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:35,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:42:35,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:42:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:42:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:42:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:42:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:42:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:42:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 18:42:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 18:42:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:42:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:42:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:42:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:42:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:42:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:42:35,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:42:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:42:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:42:35,627 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:42:35,722 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:42:35,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:42:36,015 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:42:36,118 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:42:36,118 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:42:36,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:42:36 BoogieIcfgContainer [2022-11-18 18:42:36,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:42:36,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:42:36,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:42:36,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:42:36,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:42:35" (1/3) ... [2022-11-18 18:42:36,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b7194e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:42:36, skipping insertion in model container [2022-11-18 18:42:36,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:42:35" (2/3) ... [2022-11-18 18:42:36,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b7194e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:42:36, skipping insertion in model container [2022-11-18 18:42:36,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:42:36" (3/3) ... [2022-11-18 18:42:36,131 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-11-18 18:42:36,141 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:42:36,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:42:36,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:42:36,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:42:36,233 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 18:42:36,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-11-18 18:42:36,332 INFO L130 PetriNetUnfolder]: 8/112 cut-off events. [2022-11-18 18:42:36,333 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:42:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-18 18:42:36,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2022-11-18 18:42:36,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2022-11-18 18:42:36,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:42:36,361 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;@7ab2635, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:42:36,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 18:42:36,451 INFO L130 PetriNetUnfolder]: 8/100 cut-off events. [2022-11-18 18:42:36,463 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:42:36,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:36,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:36,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:42:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1701118085, now seen corresponding path program 1 times [2022-11-18 18:42:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:36,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602562574] [2022-11-18 18:42:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:36,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:36,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:36,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602562574] [2022-11-18 18:42:36,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602562574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:36,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:36,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:42:36,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478900629] [2022-11-18 18:42:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:36,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:42:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:42:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:42:36,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 115 [2022-11-18 18:42:36,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:36,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:42:36,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 115 [2022-11-18 18:42:36,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:42:37,064 INFO L130 PetriNetUnfolder]: 59/245 cut-off events. [2022-11-18 18:42:37,064 INFO L131 PetriNetUnfolder]: For 67/68 co-relation queries the response was YES. [2022-11-18 18:42:37,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 245 events. 59/245 cut-off events. For 67/68 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 763 event pairs, 23 based on Foata normal form. 52/266 useless extension candidates. Maximal degree in co-relation 255. Up to 85 conditions per place. [2022-11-18 18:42:37,072 INFO L137 encePairwiseOnDemand]: 110/115 looper letters, 10 selfloop transitions, 0 changer transitions 2/96 dead transitions. [2022-11-18 18:42:37,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 230 flow [2022-11-18 18:42:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:42:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:42:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 213 transitions. [2022-11-18 18:42:37,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9260869565217391 [2022-11-18 18:42:37,095 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 213 transitions. [2022-11-18 18:42:37,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 213 transitions. [2022-11-18 18:42:37,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:37,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 213 transitions. [2022-11-18 18:42:37,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:37,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:37,119 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:37,122 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 2 states and 213 transitions. [2022-11-18 18:42:37,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 230 flow [2022-11-18 18:42:37,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 18:42:37,136 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 194 flow [2022-11-18 18:42:37,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2022-11-18 18:42:37,145 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2022-11-18 18:42:37,145 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 194 flow [2022-11-18 18:42:37,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:37,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:37,147 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:37,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:42:37,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:42:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2022-11-18 18:42:37,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:37,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101233350] [2022-11-18 18:42:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:37,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:38,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101233350] [2022-11-18 18:42:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101233350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:38,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:38,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:42:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926246368] [2022-11-18 18:42:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:38,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:42:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:42:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:42:38,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-11-18 18:42:38,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 194 flow. Second operand has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:38,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:42:38,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-11-18 18:42:38,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:42:39,162 INFO L130 PetriNetUnfolder]: 349/794 cut-off events. [2022-11-18 18:42:39,163 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-18 18:42:39,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 794 events. 349/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4008 event pairs, 48 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1391. Up to 295 conditions per place. [2022-11-18 18:42:39,176 INFO L137 encePairwiseOnDemand]: 105/115 looper letters, 71 selfloop transitions, 16 changer transitions 0/143 dead transitions. [2022-11-18 18:42:39,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 143 transitions, 477 flow [2022-11-18 18:42:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:42:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:42:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 710 transitions. [2022-11-18 18:42:39,182 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2022-11-18 18:42:39,182 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 710 transitions. [2022-11-18 18:42:39,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 710 transitions. [2022-11-18 18:42:39,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:39,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 710 transitions. [2022-11-18 18:42:39,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.88888888888889) internal successors, (710), 9 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:39,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:39,189 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:39,190 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 194 flow. Second operand 9 states and 710 transitions. [2022-11-18 18:42:39,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 143 transitions, 477 flow [2022-11-18 18:42:39,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 143 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:42:39,194 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 291 flow [2022-11-18 18:42:39,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=291, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2022-11-18 18:42:39,195 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 5 predicate places. [2022-11-18 18:42:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 291 flow [2022-11-18 18:42:39,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:39,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:39,196 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:39,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:42:39,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:42:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:39,197 INFO L85 PathProgramCache]: Analyzing trace with hash 667835378, now seen corresponding path program 1 times [2022-11-18 18:42:39,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:39,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916222498] [2022-11-18 18:42:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:39,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:40,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:40,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916222498] [2022-11-18 18:42:40,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916222498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:42:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914636097] [2022-11-18 18:42:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:40,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:40,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:40,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:40,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:42:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 18:42:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:42:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:41,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914636097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:42:41,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:42:41,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2022-11-18 18:42:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669628280] [2022-11-18 18:42:41,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:42:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:42:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:42:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:42:41,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 115 [2022-11-18 18:42:41,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 291 flow. Second operand has 24 states, 24 states have (on average 69.875) internal successors, (1677), 24 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:41,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:42:41,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 115 [2022-11-18 18:42:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:42:44,657 INFO L130 PetriNetUnfolder]: 1602/3193 cut-off events. [2022-11-18 18:42:44,658 INFO L131 PetriNetUnfolder]: For 1185/1192 co-relation queries the response was YES. [2022-11-18 18:42:44,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 3193 events. 1602/3193 cut-off events. For 1185/1192 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22180 event pairs, 37 based on Foata normal form. 83/3042 useless extension candidates. Maximal degree in co-relation 6986. Up to 478 conditions per place. [2022-11-18 18:42:44,682 INFO L137 encePairwiseOnDemand]: 94/115 looper letters, 235 selfloop transitions, 111 changer transitions 0/400 dead transitions. [2022-11-18 18:42:44,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 400 transitions, 1848 flow [2022-11-18 18:42:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 18:42:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-18 18:42:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3023 transitions. [2022-11-18 18:42:44,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6571739130434783 [2022-11-18 18:42:44,690 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3023 transitions. [2022-11-18 18:42:44,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3023 transitions. [2022-11-18 18:42:44,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:44,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3023 transitions. [2022-11-18 18:42:44,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 75.575) internal successors, (3023), 40 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:44,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 115.0) internal successors, (4715), 41 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:44,710 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 115.0) internal successors, (4715), 41 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:44,710 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 291 flow. Second operand 40 states and 3023 transitions. [2022-11-18 18:42:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 400 transitions, 1848 flow [2022-11-18 18:42:44,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 400 transitions, 1844 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 18:42:44,724 INFO L231 Difference]: Finished difference. Result has 170 places, 229 transitions, 1278 flow [2022-11-18 18:42:44,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1278, PETRI_PLACES=170, PETRI_TRANSITIONS=229} [2022-11-18 18:42:44,726 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 67 predicate places. [2022-11-18 18:42:44,726 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 229 transitions, 1278 flow [2022-11-18 18:42:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.875) internal successors, (1677), 24 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:44,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:44,727 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:44,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:44,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:44,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:42:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1692361064, now seen corresponding path program 1 times [2022-11-18 18:42:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546949234] [2022-11-18 18:42:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:44,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:45,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:45,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546949234] [2022-11-18 18:42:45,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546949234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:42:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66124417] [2022-11-18 18:42:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:45,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:45,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:45,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:45,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:42:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 18:42:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:46,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:42:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:46,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66124417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:42:46,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:42:46,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 23 [2022-11-18 18:42:46,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212393503] [2022-11-18 18:42:46,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:42:46,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:42:46,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:42:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:42:46,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 115 [2022-11-18 18:42:46,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 229 transitions, 1278 flow. Second operand has 23 states, 23 states have (on average 72.82608695652173) internal successors, (1675), 23 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:46,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:42:46,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 115 [2022-11-18 18:42:46,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:42:49,494 INFO L130 PetriNetUnfolder]: 2467/5125 cut-off events. [2022-11-18 18:42:49,494 INFO L131 PetriNetUnfolder]: For 26182/26257 co-relation queries the response was YES. [2022-11-18 18:42:49,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17472 conditions, 5125 events. 2467/5125 cut-off events. For 26182/26257 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40085 event pairs, 188 based on Foata normal form. 238/5114 useless extension candidates. Maximal degree in co-relation 17439. Up to 827 conditions per place. [2022-11-18 18:42:49,609 INFO L137 encePairwiseOnDemand]: 97/115 looper letters, 348 selfloop transitions, 169 changer transitions 0/583 dead transitions. [2022-11-18 18:42:49,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 583 transitions, 4623 flow [2022-11-18 18:42:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:42:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 18:42:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1994 transitions. [2022-11-18 18:42:49,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6668896321070235 [2022-11-18 18:42:49,614 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1994 transitions. [2022-11-18 18:42:49,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1994 transitions. [2022-11-18 18:42:49,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:49,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1994 transitions. [2022-11-18 18:42:49,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 76.6923076923077) internal successors, (1994), 26 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:49,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 115.0) internal successors, (3105), 27 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:49,628 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 115.0) internal successors, (3105), 27 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:49,628 INFO L175 Difference]: Start difference. First operand has 170 places, 229 transitions, 1278 flow. Second operand 26 states and 1994 transitions. [2022-11-18 18:42:49,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 583 transitions, 4623 flow [2022-11-18 18:42:49,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 583 transitions, 4039 flow, removed 274 selfloop flow, removed 9 redundant places. [2022-11-18 18:42:49,838 INFO L231 Difference]: Finished difference. Result has 198 places, 382 transitions, 2778 flow [2022-11-18 18:42:49,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2778, PETRI_PLACES=198, PETRI_TRANSITIONS=382} [2022-11-18 18:42:49,840 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 95 predicate places. [2022-11-18 18:42:49,840 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 382 transitions, 2778 flow [2022-11-18 18:42:49,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 72.82608695652173) internal successors, (1675), 23 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:49,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:49,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:49,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:50,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:50,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:42:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1246440401, now seen corresponding path program 1 times [2022-11-18 18:42:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195856840] [2022-11-18 18:42:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:50,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195856840] [2022-11-18 18:42:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195856840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:50,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:50,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:42:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694830937] [2022-11-18 18:42:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:50,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:42:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:42:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:42:50,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-11-18 18:42:50,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 382 transitions, 2778 flow. Second operand has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:50,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:42:50,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-11-18 18:42:50,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:42:51,744 INFO L130 PetriNetUnfolder]: 1598/3639 cut-off events. [2022-11-18 18:42:51,745 INFO L131 PetriNetUnfolder]: For 23063/23516 co-relation queries the response was YES. [2022-11-18 18:42:51,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15217 conditions, 3639 events. 1598/3639 cut-off events. For 23063/23516 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27951 event pairs, 149 based on Foata normal form. 110/3544 useless extension candidates. Maximal degree in co-relation 15174. Up to 1414 conditions per place. [2022-11-18 18:42:51,791 INFO L137 encePairwiseOnDemand]: 106/115 looper letters, 280 selfloop transitions, 38 changer transitions 0/436 dead transitions. [2022-11-18 18:42:51,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 436 transitions, 3996 flow [2022-11-18 18:42:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:42:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:42:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2022-11-18 18:42:51,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2022-11-18 18:42:51,794 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 655 transitions. [2022-11-18 18:42:51,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 655 transitions. [2022-11-18 18:42:51,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:51,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 655 transitions. [2022-11-18 18:42:51,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.875) internal successors, (655), 8 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:51,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:51,799 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:51,799 INFO L175 Difference]: Start difference. First operand has 198 places, 382 transitions, 2778 flow. Second operand 8 states and 655 transitions. [2022-11-18 18:42:51,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 436 transitions, 3996 flow [2022-11-18 18:42:51,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 436 transitions, 3667 flow, removed 147 selfloop flow, removed 11 redundant places. [2022-11-18 18:42:51,925 INFO L231 Difference]: Finished difference. Result has 194 places, 380 transitions, 2700 flow [2022-11-18 18:42:51,926 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=194, PETRI_TRANSITIONS=380} [2022-11-18 18:42:51,927 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 91 predicate places. [2022-11-18 18:42:51,927 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 380 transitions, 2700 flow [2022-11-18 18:42:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:51,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:51,928 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:42:51,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:42:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -693667225, now seen corresponding path program 1 times [2022-11-18 18:42:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:51,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286772449] [2022-11-18 18:42:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:51,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286772449] [2022-11-18 18:42:55,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286772449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:42:55,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385871822] [2022-11-18 18:42:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:55,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:55,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:42:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 18:42:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:08,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385871822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:08,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:08,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 20] total 37 [2022-11-18 18:43:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815719952] [2022-11-18 18:43:08,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 18:43:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 18:43:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 18:43:08,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 115 [2022-11-18 18:43:08,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 380 transitions, 2700 flow. Second operand has 37 states, 37 states have (on average 70.16216216216216) internal successors, (2596), 37 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:08,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 115 [2022-11-18 18:43:08,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:35,686 INFO L130 PetriNetUnfolder]: 15271/36158 cut-off events. [2022-11-18 18:44:35,687 INFO L131 PetriNetUnfolder]: For 99164/99655 co-relation queries the response was YES. [2022-11-18 18:44:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119340 conditions, 36158 events. 15271/36158 cut-off events. For 99164/99655 co-relation queries the response was YES. Maximal size of possible extension queue 2192. Compared 421299 event pairs, 367 based on Foata normal form. 276/34872 useless extension candidates. Maximal degree in co-relation 119296. Up to 5450 conditions per place. [2022-11-18 18:44:36,162 INFO L137 encePairwiseOnDemand]: 92/115 looper letters, 1742 selfloop transitions, 1880 changer transitions 783/4463 dead transitions. [2022-11-18 18:44:36,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 4463 transitions, 40450 flow [2022-11-18 18:44:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-11-18 18:44:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2022-11-18 18:44:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 17121 transitions. [2022-11-18 18:44:36,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.647296786389414 [2022-11-18 18:44:36,210 INFO L72 ComplementDD]: Start complementDD. Operand 230 states and 17121 transitions. [2022-11-18 18:44:36,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 230 states and 17121 transitions. [2022-11-18 18:44:36,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:36,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 230 states and 17121 transitions. [2022-11-18 18:44:36,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 231 states, 230 states have (on average 74.43913043478261) internal successors, (17121), 230 states have internal predecessors, (17121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 231 states, 231 states have (on average 115.0) internal successors, (26565), 231 states have internal predecessors, (26565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,347 INFO L81 ComplementDD]: Finished complementDD. Result has 231 states, 231 states have (on average 115.0) internal successors, (26565), 231 states have internal predecessors, (26565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,348 INFO L175 Difference]: Start difference. First operand has 194 places, 380 transitions, 2700 flow. Second operand 230 states and 17121 transitions. [2022-11-18 18:44:36,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 4463 transitions, 40450 flow [2022-11-18 18:44:37,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 4463 transitions, 40205 flow, removed 84 selfloop flow, removed 4 redundant places. [2022-11-18 18:44:37,109 INFO L231 Difference]: Finished difference. Result has 538 places, 2409 transitions, 24386 flow [2022-11-18 18:44:37,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=230, PETRI_FLOW=24386, PETRI_PLACES=538, PETRI_TRANSITIONS=2409} [2022-11-18 18:44:37,111 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 435 predicate places. [2022-11-18 18:44:37,111 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 2409 transitions, 24386 flow [2022-11-18 18:44:37,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 70.16216216216216) internal successors, (2596), 37 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:37,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:37,112 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:37,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:37,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:44:37,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:44:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1994774965, now seen corresponding path program 2 times [2022-11-18 18:44:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:37,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753394171] [2022-11-18 18:44:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:40,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:40,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753394171] [2022-11-18 18:44:40,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753394171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484764681] [2022-11-18 18:44:40,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:44:40,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:40,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:40,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:44:40,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:44:40,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:44:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:42,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:48,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484764681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:48,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:48,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-11-18 18:44:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770686915] [2022-11-18 18:44:48,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:48,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 18:44:48,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 18:44:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 18:44:48,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 115 [2022-11-18 18:44:48,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 2409 transitions, 24386 flow. Second operand has 40 states, 40 states have (on average 68.325) internal successors, (2733), 40 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:48,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:48,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 115 [2022-11-18 18:44:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:00,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:11,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:00,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:44,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:43,983 INFO L130 PetriNetUnfolder]: 40592/86996 cut-off events. [2022-11-18 18:48:43,984 INFO L131 PetriNetUnfolder]: For 830523/831696 co-relation queries the response was YES. [2022-11-18 18:48:45,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364886 conditions, 86996 events. 40592/86996 cut-off events. For 830523/831696 co-relation queries the response was YES. Maximal size of possible extension queue 4803. Compared 1059045 event pairs, 2384 based on Foata normal form. 547/82428 useless extension candidates. Maximal degree in co-relation 364724. Up to 12963 conditions per place. [2022-11-18 18:48:46,414 INFO L137 encePairwiseOnDemand]: 90/115 looper letters, 3064 selfloop transitions, 4195 changer transitions 1492/8807 dead transitions. [2022-11-18 18:48:46,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 8807 transitions, 106478 flow [2022-11-18 18:48:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-11-18 18:48:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2022-11-18 18:48:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 18692 transitions. [2022-11-18 18:48:46,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6275642101729059 [2022-11-18 18:48:46,447 INFO L72 ComplementDD]: Start complementDD. Operand 259 states and 18692 transitions. [2022-11-18 18:48:46,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 259 states and 18692 transitions. [2022-11-18 18:48:46,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:46,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 259 states and 18692 transitions. [2022-11-18 18:48:46,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 260 states, 259 states have (on average 72.16988416988417) internal successors, (18692), 259 states have internal predecessors, (18692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 260 states, 260 states have (on average 115.0) internal successors, (29900), 260 states have internal predecessors, (29900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,552 INFO L81 ComplementDD]: Finished complementDD. Result has 260 states, 260 states have (on average 115.0) internal successors, (29900), 260 states have internal predecessors, (29900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,553 INFO L175 Difference]: Start difference. First operand has 538 places, 2409 transitions, 24386 flow. Second operand 259 states and 18692 transitions. [2022-11-18 18:48:46,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 8807 transitions, 106478 flow [2022-11-18 18:49:03,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 8807 transitions, 96653 flow, removed 4877 selfloop flow, removed 97 redundant places. [2022-11-18 18:49:03,820 INFO L231 Difference]: Finished difference. Result has 824 places, 5315 transitions, 67912 flow [2022-11-18 18:49:03,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=22409, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=259, PETRI_FLOW=67912, PETRI_PLACES=824, PETRI_TRANSITIONS=5315} [2022-11-18 18:49:03,823 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 721 predicate places. [2022-11-18 18:49:03,823 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 5315 transitions, 67912 flow [2022-11-18 18:49:03,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 68.325) internal successors, (2733), 40 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:03,824 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:03,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:04,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a470435-5334-48b9-8f14-de954cbebbee/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:49:04,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:49:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2138067035, now seen corresponding path program 3 times [2022-11-18 18:49:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:04,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183257785] [2022-11-18 18:49:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:04,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 18:49:04,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183257785] [2022-11-18 18:49:04,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183257785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:04,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:04,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:49:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710535518] [2022-11-18 18:49:04,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:04,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:49:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:49:04,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:49:04,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2022-11-18 18:49:04,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 5315 transitions, 67912 flow. Second operand has 6 states, 6 states have (on average 90.33333333333333) internal successors, (542), 6 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:04,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:04,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2022-11-18 18:49:04,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand