./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --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_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/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_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/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_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- 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 18:46:01,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:46:01,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:46:01,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:46:01,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:46:01,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:46:01,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:46:01,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:46:01,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:46:01,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:46:01,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:46:01,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:46:01,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:46:01,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:46:01,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:46:01,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:46:01,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:46:01,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:46:01,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:46:01,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:46:01,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:46:01,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:46:01,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:46:01,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:46:01,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:46:01,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:46:01,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:46:01,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:46:01,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:46:01,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:46:01,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:46:01,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:46:01,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:46:01,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:46:01,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:46:01,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:46:01,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:46:01,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:46:01,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:46:01,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:46:01,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:46:01,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:46:01,990 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:46:01,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:46:01,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:46:01,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:46:02,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:46:02,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:46:02,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:46:02,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:46:02,001 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:46:02,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:46:02,003 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:46:02,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:46:02,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:46:02,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:46:02,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:46:02,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:46:02,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:46:02,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:46:02,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:46:02,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:46:02,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:46:02,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:46:02,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:46:02,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:46:02,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:02,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:46:02,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:46:02,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:46:02,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:46:02,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:46:02,008 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:46:02,008 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:46:02,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:46:02,009 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_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-11-18 18:46:02,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:46:02,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:46:02,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:46:02,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:46:02,357 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:46:02,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/stack-1.i [2022-11-18 18:46:02,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/data/99d731061/7e0fa9195218414691ed386a3c9d0c8b/FLAG48f0d809c [2022-11-18 18:46:03,105 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:46:03,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/sv-benchmarks/c/pthread/stack-1.i [2022-11-18 18:46:03,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/data/99d731061/7e0fa9195218414691ed386a3c9d0c8b/FLAG48f0d809c [2022-11-18 18:46:03,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/data/99d731061/7e0fa9195218414691ed386a3c9d0c8b [2022-11-18 18:46:03,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:46:03,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:46:03,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:03,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:46:03,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:46:03,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:03" (1/1) ... [2022-11-18 18:46:03,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5156eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:03, skipping insertion in model container [2022-11-18 18:46:03,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:46:03" (1/1) ... [2022-11-18 18:46:03,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:46:03,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:46:04,004 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_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-18 18:46:04,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:04,053 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:46:04,091 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_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-18 18:46:04,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:46:04,191 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:46:04,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04 WrapperNode [2022-11-18 18:46:04,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:46:04,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:04,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:46:04,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:46:04,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,262 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 152 [2022-11-18 18:46:04,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:46:04,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:46:04,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:46:04,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:46:04,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:46:04,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:46:04,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:46:04,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:46:04,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (1/1) ... [2022-11-18 18:46:04,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:46:04,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:04,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:46:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:46:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:46:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:46:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:46:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:46:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:46:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:46:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:46:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:46:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:46:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:46:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:46:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:46:04,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:46:04,393 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 18:46:04,581 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:46:04,583 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:46:04,959 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:46:04,969 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:46:04,969 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:46:04,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:04 BoogieIcfgContainer [2022-11-18 18:46:04,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:46:04,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:46:04,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:46:04,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:46:04,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:46:03" (1/3) ... [2022-11-18 18:46:04,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7fc449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:04, skipping insertion in model container [2022-11-18 18:46:04,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:46:04" (2/3) ... [2022-11-18 18:46:04,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7fc449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:46:04, skipping insertion in model container [2022-11-18 18:46:04,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:46:04" (3/3) ... [2022-11-18 18:46:04,991 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-11-18 18:46:04,999 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:46:05,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:46:05,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:46:05,011 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:46:05,188 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:46:05,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2022-11-18 18:46:05,396 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2022-11-18 18:46:05,396 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:46:05,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 416 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-18 18:46:05,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2022-11-18 18:46:05,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 162 transitions, 333 flow [2022-11-18 18:46:05,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:46:05,428 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;@62fc7609, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:46:05,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 18:46:05,465 INFO L130 PetriNetUnfolder]: 5/131 cut-off events. [2022-11-18 18:46:05,466 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:46:05,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:05,467 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] [2022-11-18 18:46:05,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1733795347, now seen corresponding path program 1 times [2022-11-18 18:46:05,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:05,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638706239] [2022-11-18 18:46:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:06,049 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 18:46:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:06,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638706239] [2022-11-18 18:46:06,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638706239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:06,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:06,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593468490] [2022-11-18 18:46:06,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:06,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:06,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 174 [2022-11-18 18:46:06,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 162 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 18:46:06,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:06,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 174 [2022-11-18 18:46:06,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:06,392 INFO L130 PetriNetUnfolder]: 88/701 cut-off events. [2022-11-18 18:46:06,392 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-18 18:46:06,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 701 events. 88/701 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3108 event pairs, 32 based on Foata normal form. 69/704 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-18 18:46:06,405 INFO L137 encePairwiseOnDemand]: 164/174 looper letters, 20 selfloop transitions, 3 changer transitions 0/160 dead transitions. [2022-11-18 18:46:06,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 160 transitions, 381 flow [2022-11-18 18:46:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:46:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2022-11-18 18:46:06,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9291187739463601 [2022-11-18 18:46:06,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2022-11-18 18:46:06,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2022-11-18 18:46:06,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:06,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2022-11-18 18:46:06,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 18:46:06,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 18:46:06,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 18:46:06,459 INFO L175 Difference]: Start difference. First operand has 159 places, 162 transitions, 333 flow. Second operand 3 states and 485 transitions. [2022-11-18 18:46:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 160 transitions, 381 flow [2022-11-18 18:46:06,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 373 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:46:06,472 INFO L231 Difference]: Finished difference. Result has 155 places, 154 transitions, 327 flow [2022-11-18 18:46:06,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=155, PETRI_TRANSITIONS=154} [2022-11-18 18:46:06,481 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -4 predicate places. [2022-11-18 18:46:06,482 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 154 transitions, 327 flow [2022-11-18 18:46:06,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 18:46:06,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:06,483 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] [2022-11-18 18:46:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:46:06,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1890401601, now seen corresponding path program 1 times [2022-11-18 18:46:06,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:06,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434162458] [2022-11-18 18:46:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:06,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:06,764 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 18:46:06,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:06,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434162458] [2022-11-18 18:46:06,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434162458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:06,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:46:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531792163] [2022-11-18 18:46:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:46:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:06,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:46:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:46:06,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 174 [2022-11-18 18:46:06,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 154 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 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 18:46:06,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:06,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 174 [2022-11-18 18:46:06,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:07,029 INFO L130 PetriNetUnfolder]: 34/592 cut-off events. [2022-11-18 18:46:07,030 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 18:46:07,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 592 events. 34/592 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2029 event pairs, 11 based on Foata normal form. 0/555 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-18 18:46:07,034 INFO L137 encePairwiseOnDemand]: 169/174 looper letters, 16 selfloop transitions, 4 changer transitions 0/162 dead transitions. [2022-11-18 18:46:07,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 162 transitions, 388 flow [2022-11-18 18:46:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:46:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 18:46:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 637 transitions. [2022-11-18 18:46:07,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9152298850574713 [2022-11-18 18:46:07,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 637 transitions. [2022-11-18 18:46:07,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 637 transitions. [2022-11-18 18:46:07,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:07,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 637 transitions. [2022-11-18 18:46:07,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 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 18:46:07,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 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 18:46:07,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 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 18:46:07,049 INFO L175 Difference]: Start difference. First operand has 155 places, 154 transitions, 327 flow. Second operand 4 states and 637 transitions. [2022-11-18 18:46:07,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 162 transitions, 388 flow [2022-11-18 18:46:07,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 162 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:07,059 INFO L231 Difference]: Finished difference. Result has 159 places, 157 transitions, 352 flow [2022-11-18 18:46:07,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=159, PETRI_TRANSITIONS=157} [2022-11-18 18:46:07,060 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 0 predicate places. [2022-11-18 18:46:07,060 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 157 transitions, 352 flow [2022-11-18 18:46:07,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 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 18:46:07,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:07,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:07,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:46:07,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1613921161, now seen corresponding path program 1 times [2022-11-18 18:46:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:07,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672331170] [2022-11-18 18:46:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:07,285 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 18:46:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:07,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672331170] [2022-11-18 18:46:07,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672331170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:07,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:07,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:07,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754853667] [2022-11-18 18:46:07,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:07,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 174 [2022-11-18 18:46:07,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 157 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 18:46:07,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:07,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 174 [2022-11-18 18:46:07,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:07,633 INFO L130 PetriNetUnfolder]: 127/1269 cut-off events. [2022-11-18 18:46:07,633 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-18 18:46:07,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1269 events. 127/1269 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6926 event pairs, 33 based on Foata normal form. 12/1207 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-18 18:46:07,644 INFO L137 encePairwiseOnDemand]: 168/174 looper letters, 25 selfloop transitions, 4 changer transitions 0/169 dead transitions. [2022-11-18 18:46:07,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 169 transitions, 443 flow [2022-11-18 18:46:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:46:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-11-18 18:46:07,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9195402298850575 [2022-11-18 18:46:07,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-11-18 18:46:07,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-11-18 18:46:07,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:07,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-11-18 18:46:07,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 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 18:46:07,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 18:46:07,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 18:46:07,654 INFO L175 Difference]: Start difference. First operand has 159 places, 157 transitions, 352 flow. Second operand 3 states and 480 transitions. [2022-11-18 18:46:07,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 169 transitions, 443 flow [2022-11-18 18:46:07,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 169 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:07,663 INFO L231 Difference]: Finished difference. Result has 162 places, 161 transitions, 392 flow [2022-11-18 18:46:07,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=162, PETRI_TRANSITIONS=161} [2022-11-18 18:46:07,666 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 3 predicate places. [2022-11-18 18:46:07,666 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 161 transitions, 392 flow [2022-11-18 18:46:07,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 18:46:07,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:07,668 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:46:07,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:46:07,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -316867069, now seen corresponding path program 1 times [2022-11-18 18:46:07,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674873796] [2022-11-18 18:46:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:07,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:07,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674873796] [2022-11-18 18:46:07,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674873796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909943193] [2022-11-18 18:46:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:07,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:07,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:07,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:46:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:46:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:08,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909943193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:46:08,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:46:08,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:46:08,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471501986] [2022-11-18 18:46:08,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:46:08,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:46:08,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:46:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:46:08,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 174 [2022-11-18 18:46:08,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 161 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 150.5) internal successors, (1505), 10 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:08,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:08,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 174 [2022-11-18 18:46:08,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:09,290 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([468] L1009-->L1011: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][182], [Black: 188#true, 30#L1023-4true, Black: 176#(= ~top~0 0), 114#L1011true, 194#true, 32#L946-2true, 190#(<= 1 ~top~0), Black: 181#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 184#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret41#1| 0)), t2Thread1of1ForFork1InUse]) [2022-11-18 18:46:09,295 INFO L383 tUnfolder$Statistics]: this new event has 187 ancestors and is cut-off event [2022-11-18 18:46:09,295 INFO L386 tUnfolder$Statistics]: existing Event has 167 ancestors and is cut-off event [2022-11-18 18:46:09,295 INFO L386 tUnfolder$Statistics]: existing Event has 159 ancestors and is cut-off event [2022-11-18 18:46:09,295 INFO L386 tUnfolder$Statistics]: existing Event has 166 ancestors and is cut-off event [2022-11-18 18:46:09,296 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([469] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][183], [Black: 190#(<= 1 ~top~0), 30#L1023-4true, 271#(<= ~top~0 0), Black: 176#(= ~top~0 0), 85#L1009-1true, 32#L946-2true, Black: 181#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 184#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret41#1| 0)), t2Thread1of1ForFork1InUse, 188#true]) [2022-11-18 18:46:09,296 INFO L383 tUnfolder$Statistics]: this new event has 187 ancestors and is cut-off event [2022-11-18 18:46:09,296 INFO L386 tUnfolder$Statistics]: existing Event has 167 ancestors and is cut-off event [2022-11-18 18:46:09,296 INFO L386 tUnfolder$Statistics]: existing Event has 159 ancestors and is cut-off event [2022-11-18 18:46:09,296 INFO L386 tUnfolder$Statistics]: existing Event has 166 ancestors and is cut-off event [2022-11-18 18:46:09,445 INFO L130 PetriNetUnfolder]: 388/2713 cut-off events. [2022-11-18 18:46:09,446 INFO L131 PetriNetUnfolder]: For 980/1066 co-relation queries the response was YES. [2022-11-18 18:46:09,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4157 conditions, 2713 events. 388/2713 cut-off events. For 980/1066 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19041 event pairs, 64 based on Foata normal form. 38/2604 useless extension candidates. Maximal degree in co-relation 3619. Up to 300 conditions per place. [2022-11-18 18:46:09,465 INFO L137 encePairwiseOnDemand]: 165/174 looper letters, 86 selfloop transitions, 46 changer transitions 1/271 dead transitions. [2022-11-18 18:46:09,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 271 transitions, 1074 flow [2022-11-18 18:46:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:46:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:46:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2795 transitions. [2022-11-18 18:46:09,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8924010217113666 [2022-11-18 18:46:09,472 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2795 transitions. [2022-11-18 18:46:09,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2795 transitions. [2022-11-18 18:46:09,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:09,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2795 transitions. [2022-11-18 18:46:09,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.27777777777777) internal successors, (2795), 18 states have internal predecessors, (2795), 0 states have call successors, (0), 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 18:46:09,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 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 18:46:09,491 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 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 18:46:09,491 INFO L175 Difference]: Start difference. First operand has 162 places, 161 transitions, 392 flow. Second operand 18 states and 2795 transitions. [2022-11-18 18:46:09,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 271 transitions, 1074 flow [2022-11-18 18:46:09,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 271 transitions, 1012 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-18 18:46:09,504 INFO L231 Difference]: Finished difference. Result has 183 places, 216 transitions, 763 flow [2022-11-18 18:46:09,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=763, PETRI_PLACES=183, PETRI_TRANSITIONS=216} [2022-11-18 18:46:09,507 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 24 predicate places. [2022-11-18 18:46:09,507 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 216 transitions, 763 flow [2022-11-18 18:46:09,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.5) internal successors, (1505), 10 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:09,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:09,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:09,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 18:46:09,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:09,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1501067452, now seen corresponding path program 1 times [2022-11-18 18:46:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:09,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974480076] [2022-11-18 18:46:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:09,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:09,907 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 18:46:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:09,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974480076] [2022-11-18 18:46:09,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974480076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:09,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:09,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:46:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672862382] [2022-11-18 18:46:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:09,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:46:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:09,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:46:09,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:46:09,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 174 [2022-11-18 18:46:09,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 216 transitions, 763 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 18:46:09,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:09,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 174 [2022-11-18 18:46:09,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:10,213 INFO L130 PetriNetUnfolder]: 54/1109 cut-off events. [2022-11-18 18:46:10,213 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-18 18:46:10,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 1109 events. 54/1109 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4852 event pairs, 9 based on Foata normal form. 18/1084 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-18 18:46:10,220 INFO L137 encePairwiseOnDemand]: 170/174 looper letters, 12 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2022-11-18 18:46:10,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 175 transitions, 540 flow [2022-11-18 18:46:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:46:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:46:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-11-18 18:46:10,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9080459770114943 [2022-11-18 18:46:10,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-11-18 18:46:10,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-11-18 18:46:10,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:10,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-11-18 18:46:10,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 18:46:10,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 18:46:10,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 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 18:46:10,226 INFO L175 Difference]: Start difference. First operand has 183 places, 216 transitions, 763 flow. Second operand 3 states and 474 transitions. [2022-11-18 18:46:10,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 175 transitions, 540 flow [2022-11-18 18:46:10,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 175 transitions, 518 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-18 18:46:10,234 INFO L231 Difference]: Finished difference. Result has 173 places, 173 transitions, 487 flow [2022-11-18 18:46:10,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=487, PETRI_PLACES=173, PETRI_TRANSITIONS=173} [2022-11-18 18:46:10,237 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 14 predicate places. [2022-11-18 18:46:10,237 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 173 transitions, 487 flow [2022-11-18 18:46:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 18:46:10,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:10,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:10,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:46:10,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash 166990916, now seen corresponding path program 1 times [2022-11-18 18:46:10,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:10,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864438559] [2022-11-18 18:46:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:12,423 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 18:46:12,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:12,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864438559] [2022-11-18 18:46:12,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864438559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:12,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:12,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-18 18:46:12,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434952354] [2022-11-18 18:46:12,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:12,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:46:12,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:12,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:46:12,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:46:12,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-18 18:46:12,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 173 transitions, 487 flow. Second operand has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 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 18:46:12,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:12,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-18 18:46:12,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:18,187 INFO L130 PetriNetUnfolder]: 1122/4495 cut-off events. [2022-11-18 18:46:18,187 INFO L131 PetriNetUnfolder]: For 905/905 co-relation queries the response was YES. [2022-11-18 18:46:18,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8477 conditions, 4495 events. 1122/4495 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 31938 event pairs, 171 based on Foata normal form. 20/4366 useless extension candidates. Maximal degree in co-relation 5125. Up to 1466 conditions per place. [2022-11-18 18:46:18,216 INFO L137 encePairwiseOnDemand]: 139/174 looper letters, 251 selfloop transitions, 57 changer transitions 33/425 dead transitions. [2022-11-18 18:46:18,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 425 transitions, 1855 flow [2022-11-18 18:46:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 18:46:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-18 18:46:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4396 transitions. [2022-11-18 18:46:18,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5875434375835338 [2022-11-18 18:46:18,229 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4396 transitions. [2022-11-18 18:46:18,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4396 transitions. [2022-11-18 18:46:18,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:18,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4396 transitions. [2022-11-18 18:46:18,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 102.23255813953489) internal successors, (4396), 43 states have internal predecessors, (4396), 0 states have call successors, (0), 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 18:46:18,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 174.0) internal successors, (7656), 44 states have internal predecessors, (7656), 0 states have call successors, (0), 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 18:46:18,263 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 174.0) internal successors, (7656), 44 states have internal predecessors, (7656), 0 states have call successors, (0), 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 18:46:18,263 INFO L175 Difference]: Start difference. First operand has 173 places, 173 transitions, 487 flow. Second operand 43 states and 4396 transitions. [2022-11-18 18:46:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 425 transitions, 1855 flow [2022-11-18 18:46:18,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 425 transitions, 1851 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:18,276 INFO L231 Difference]: Finished difference. Result has 253 places, 228 transitions, 964 flow [2022-11-18 18:46:18,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=964, PETRI_PLACES=253, PETRI_TRANSITIONS=228} [2022-11-18 18:46:18,281 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 94 predicate places. [2022-11-18 18:46:18,281 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 228 transitions, 964 flow [2022-11-18 18:46:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 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 18:46:18,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:18,283 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:46:18,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1719758584, now seen corresponding path program 2 times [2022-11-18 18:46:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412565772] [2022-11-18 18:46:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:20,955 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 18:46:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:20,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412565772] [2022-11-18 18:46:20,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412565772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:20,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:20,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-18 18:46:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833997994] [2022-11-18 18:46:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:20,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 18:46:20,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 18:46:20,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:46:20,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-11-18 18:46:20,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 228 transitions, 964 flow. Second operand has 27 states, 27 states have (on average 86.55555555555556) internal successors, (2337), 27 states have internal predecessors, (2337), 0 states have call successors, (0), 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 18:46:20,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:20,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-11-18 18:46:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:26,706 INFO L130 PetriNetUnfolder]: 1758/7125 cut-off events. [2022-11-18 18:46:26,707 INFO L131 PetriNetUnfolder]: For 5415/5417 co-relation queries the response was YES. [2022-11-18 18:46:26,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16653 conditions, 7125 events. 1758/7125 cut-off events. For 5415/5417 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 54700 event pairs, 450 based on Foata normal form. 14/7006 useless extension candidates. Maximal degree in co-relation 11036. Up to 2357 conditions per place. [2022-11-18 18:46:26,850 INFO L137 encePairwiseOnDemand]: 138/174 looper letters, 291 selfloop transitions, 59 changer transitions 26/452 dead transitions. [2022-11-18 18:46:26,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 452 transitions, 2757 flow [2022-11-18 18:46:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:46:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 18:46:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3046 transitions. [2022-11-18 18:46:26,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5304771856495994 [2022-11-18 18:46:26,867 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3046 transitions. [2022-11-18 18:46:26,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3046 transitions. [2022-11-18 18:46:26,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:26,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3046 transitions. [2022-11-18 18:46:26,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 92.3030303030303) internal successors, (3046), 33 states have internal predecessors, (3046), 0 states have call successors, (0), 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 18:46:26,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 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 18:46:26,889 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 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 18:46:26,890 INFO L175 Difference]: Start difference. First operand has 253 places, 228 transitions, 964 flow. Second operand 33 states and 3046 transitions. [2022-11-18 18:46:26,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 452 transitions, 2757 flow [2022-11-18 18:46:26,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 452 transitions, 2748 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 18:46:26,929 INFO L231 Difference]: Finished difference. Result has 300 places, 263 transitions, 1438 flow [2022-11-18 18:46:26,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1438, PETRI_PLACES=300, PETRI_TRANSITIONS=263} [2022-11-18 18:46:26,930 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 141 predicate places. [2022-11-18 18:46:26,931 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 263 transitions, 1438 flow [2022-11-18 18:46:26,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.55555555555556) internal successors, (2337), 27 states have internal predecessors, (2337), 0 states have call successors, (0), 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 18:46:26,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:26,932 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:46:26,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:46:26,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 522885918, now seen corresponding path program 3 times [2022-11-18 18:46:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397575990] [2022-11-18 18:46:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:26,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:29,247 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 18:46:29,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397575990] [2022-11-18 18:46:29,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397575990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:46:29,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:46:29,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 18:46:29,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121423262] [2022-11-18 18:46:29,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:29,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 18:46:29,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:29,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 18:46:29,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-11-18 18:46:29,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2022-11-18 18:46:29,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 263 transitions, 1438 flow. Second operand has 29 states, 29 states have (on average 85.37931034482759) internal successors, (2476), 29 states have internal predecessors, (2476), 0 states have call successors, (0), 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 18:46:29,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:29,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2022-11-18 18:46:29,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:38,488 INFO L130 PetriNetUnfolder]: 2158/8890 cut-off events. [2022-11-18 18:46:38,488 INFO L131 PetriNetUnfolder]: For 9645/9645 co-relation queries the response was YES. [2022-11-18 18:46:38,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21773 conditions, 8890 events. 2158/8890 cut-off events. For 9645/9645 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 73672 event pairs, 242 based on Foata normal form. 34/8767 useless extension candidates. Maximal degree in co-relation 13661. Up to 1596 conditions per place. [2022-11-18 18:46:38,571 INFO L137 encePairwiseOnDemand]: 137/174 looper letters, 260 selfloop transitions, 127 changer transitions 33/496 dead transitions. [2022-11-18 18:46:38,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 496 transitions, 3337 flow [2022-11-18 18:46:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 18:46:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-18 18:46:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4133 transitions. [2022-11-18 18:46:38,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5163668165917041 [2022-11-18 18:46:38,586 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4133 transitions. [2022-11-18 18:46:38,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4133 transitions. [2022-11-18 18:46:38,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:38,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4133 transitions. [2022-11-18 18:46:38,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 89.84782608695652) internal successors, (4133), 46 states have internal predecessors, (4133), 0 states have call successors, (0), 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 18:46:38,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 174.0) internal successors, (8178), 47 states have internal predecessors, (8178), 0 states have call successors, (0), 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 18:46:38,626 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 174.0) internal successors, (8178), 47 states have internal predecessors, (8178), 0 states have call successors, (0), 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 18:46:38,626 INFO L175 Difference]: Start difference. First operand has 300 places, 263 transitions, 1438 flow. Second operand 46 states and 4133 transitions. [2022-11-18 18:46:38,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 496 transitions, 3337 flow [2022-11-18 18:46:38,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 496 transitions, 3290 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-18 18:46:38,689 INFO L231 Difference]: Finished difference. Result has 360 places, 299 transitions, 2185 flow [2022-11-18 18:46:38,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2185, PETRI_PLACES=360, PETRI_TRANSITIONS=299} [2022-11-18 18:46:38,690 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 201 predicate places. [2022-11-18 18:46:38,691 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 299 transitions, 2185 flow [2022-11-18 18:46:38,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.37931034482759) internal successors, (2476), 29 states have internal predecessors, (2476), 0 states have call successors, (0), 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 18:46:38,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:38,693 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:46:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:46:38,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1245575865, now seen corresponding path program 1 times [2022-11-18 18:46:38,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:38,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817307148] [2022-11-18 18:46:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:38,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:40,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:46:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817307148] [2022-11-18 18:46:40,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817307148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602260772] [2022-11-18 18:46:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:40,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:46:40,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:46:40,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:46:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:46:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:46:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:46:43,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-18 18:46:44,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2022-11-18 18:46:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:46:44,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:46:45,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-18 18:46:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:46:46,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602260772] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:46:46,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:46:46,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 69 [2022-11-18 18:46:46,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896871118] [2022-11-18 18:46:46,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:46:46,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 18:46:46,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:46:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 18:46:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=4410, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 18:46:46,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-18 18:46:46,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 299 transitions, 2185 flow. Second operand has 22 states, 22 states have (on average 98.63636363636364) internal successors, (2170), 22 states have internal predecessors, (2170), 0 states have call successors, (0), 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 18:46:46,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:46:46,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-18 18:46:46,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:57,741 INFO L130 PetriNetUnfolder]: 3191/13209 cut-off events. [2022-11-18 18:46:57,741 INFO L131 PetriNetUnfolder]: For 24485/24485 co-relation queries the response was YES. [2022-11-18 18:46:57,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35878 conditions, 13209 events. 3191/13209 cut-off events. For 24485/24485 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 121268 event pairs, 425 based on Foata normal form. 8/12969 useless extension candidates. Maximal degree in co-relation 18680. Up to 1810 conditions per place. [2022-11-18 18:46:57,863 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 286 selfloop transitions, 255 changer transitions 3/628 dead transitions. [2022-11-18 18:46:57,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 628 transitions, 5254 flow [2022-11-18 18:46:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 18:46:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-18 18:46:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6504 transitions. [2022-11-18 18:46:57,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5750663129973475 [2022-11-18 18:46:57,876 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6504 transitions. [2022-11-18 18:46:57,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6504 transitions. [2022-11-18 18:46:57,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:57,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6504 transitions. [2022-11-18 18:46:57,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 100.06153846153846) internal successors, (6504), 65 states have internal predecessors, (6504), 0 states have call successors, (0), 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 18:46:57,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 174.0) internal successors, (11484), 66 states have internal predecessors, (11484), 0 states have call successors, (0), 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 18:46:57,910 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 174.0) internal successors, (11484), 66 states have internal predecessors, (11484), 0 states have call successors, (0), 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 18:46:57,911 INFO L175 Difference]: Start difference. First operand has 360 places, 299 transitions, 2185 flow. Second operand 65 states and 6504 transitions. [2022-11-18 18:46:57,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 628 transitions, 5254 flow [2022-11-18 18:46:58,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 628 transitions, 4895 flow, removed 154 selfloop flow, removed 18 redundant places. [2022-11-18 18:46:58,058 INFO L231 Difference]: Finished difference. Result has 423 places, 449 transitions, 3979 flow [2022-11-18 18:46:58,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3979, PETRI_PLACES=423, PETRI_TRANSITIONS=449} [2022-11-18 18:46:58,060 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 264 predicate places. [2022-11-18 18:46:58,060 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 449 transitions, 3979 flow [2022-11-18 18:46:58,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.63636363636364) internal successors, (2170), 22 states have internal predecessors, (2170), 0 states have call successors, (0), 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 18:46:58,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:46:58,062 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:46:58,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:46:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:46:58,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:46:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:46:58,269 INFO L85 PathProgramCache]: Analyzing trace with hash -539171569, now seen corresponding path program 2 times [2022-11-18 18:46:58,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:46:58,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367191154] [2022-11-18 18:46:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:46:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:46:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:00,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:00,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367191154] [2022-11-18 18:47:00,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367191154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:00,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347024863] [2022-11-18 18:47:00,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:00,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:00,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:00,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:00,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:47:00,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:47:00,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:47:00,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:01,085 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:47:01,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 18:47:01,102 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:47:01,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:47:02,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-18 18:47:02,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-18 18:47:03,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-11-18 18:47:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:47:03,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:04,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:04,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 18:47:05,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:47:05,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 18:47:05,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-18 18:47:06,428 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:47:06,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:47:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:47:06,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347024863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:06,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:06,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 74 [2022-11-18 18:47:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797121686] [2022-11-18 18:47:06,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:06,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-18 18:47:06,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:06,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-18 18:47:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5133, Unknown=14, NotChecked=0, Total=5402 [2022-11-18 18:47:06,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-11-18 18:47:06,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 449 transitions, 3979 flow. Second operand has 74 states, 74 states have (on average 87.4054054054054) internal successors, (6468), 74 states have internal predecessors, (6468), 0 states have call successors, (0), 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 18:47:06,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:06,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-11-18 18:47:06,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:55,537 INFO L130 PetriNetUnfolder]: 3729/15302 cut-off events. [2022-11-18 18:47:55,537 INFO L131 PetriNetUnfolder]: For 32057/32057 co-relation queries the response was YES. [2022-11-18 18:47:55,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43723 conditions, 15302 events. 3729/15302 cut-off events. For 32057/32057 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 147860 event pairs, 172 based on Foata normal form. 16/15042 useless extension candidates. Maximal degree in co-relation 35040. Up to 2112 conditions per place. [2022-11-18 18:47:55,746 INFO L137 encePairwiseOnDemand]: 136/174 looper letters, 395 selfloop transitions, 402 changer transitions 18/891 dead transitions. [2022-11-18 18:47:55,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 891 transitions, 7994 flow [2022-11-18 18:47:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-18 18:47:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2022-11-18 18:47:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 9930 transitions. [2022-11-18 18:47:55,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5095443349753694 [2022-11-18 18:47:55,777 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 9930 transitions. [2022-11-18 18:47:55,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 9930 transitions. [2022-11-18 18:47:55,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 9930 transitions. [2022-11-18 18:47:55,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 88.66071428571429) internal successors, (9930), 112 states have internal predecessors, (9930), 0 states have call successors, (0), 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 18:47:55,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 174.0) internal successors, (19662), 113 states have internal predecessors, (19662), 0 states have call successors, (0), 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 18:47:55,853 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 174.0) internal successors, (19662), 113 states have internal predecessors, (19662), 0 states have call successors, (0), 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 18:47:55,853 INFO L175 Difference]: Start difference. First operand has 423 places, 449 transitions, 3979 flow. Second operand 112 states and 9930 transitions. [2022-11-18 18:47:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 891 transitions, 7994 flow [2022-11-18 18:47:56,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 891 transitions, 7164 flow, removed 391 selfloop flow, removed 9 redundant places. [2022-11-18 18:47:56,229 INFO L231 Difference]: Finished difference. Result has 543 places, 583 transitions, 5576 flow [2022-11-18 18:47:56,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=5576, PETRI_PLACES=543, PETRI_TRANSITIONS=583} [2022-11-18 18:47:56,231 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 384 predicate places. [2022-11-18 18:47:56,231 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 583 transitions, 5576 flow [2022-11-18 18:47:56,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 87.4054054054054) internal successors, (6468), 74 states have internal predecessors, (6468), 0 states have call successors, (0), 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 18:47:56,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:56,234 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:47:56,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:47:56,446 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:47:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -442099081, now seen corresponding path program 1 times [2022-11-18 18:47:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249588760] [2022-11-18 18:47:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:56,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 18:47:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249588760] [2022-11-18 18:47:56,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249588760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732028357] [2022-11-18 18:47:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:56,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:56,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:56,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:47:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:47:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 18:47:57,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 18:47:57,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732028357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:57,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:57,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-18 18:47:57,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141917780] [2022-11-18 18:47:57,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:57,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:47:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:47:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:47:57,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2022-11-18 18:47:57,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 583 transitions, 5576 flow. Second operand has 16 states, 16 states have (on average 149.375) internal successors, (2390), 16 states have internal predecessors, (2390), 0 states have call successors, (0), 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 18:47:57,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:57,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2022-11-18 18:47:57,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:00,698 INFO L130 PetriNetUnfolder]: 631/7555 cut-off events. [2022-11-18 18:48:00,699 INFO L131 PetriNetUnfolder]: For 19144/19146 co-relation queries the response was YES. [2022-11-18 18:48:00,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20997 conditions, 7555 events. 631/7555 cut-off events. For 19144/19146 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 65620 event pairs, 153 based on Foata normal form. 22/7409 useless extension candidates. Maximal degree in co-relation 18977. Up to 293 conditions per place. [2022-11-18 18:48:00,773 INFO L137 encePairwiseOnDemand]: 164/174 looper letters, 107 selfloop transitions, 163 changer transitions 1/678 dead transitions. [2022-11-18 18:48:00,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 678 transitions, 6891 flow [2022-11-18 18:48:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:48:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 18:48:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3302 transitions. [2022-11-18 18:48:00,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8625914315569488 [2022-11-18 18:48:00,779 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3302 transitions. [2022-11-18 18:48:00,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3302 transitions. [2022-11-18 18:48:00,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:00,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3302 transitions. [2022-11-18 18:48:00,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 150.0909090909091) internal successors, (3302), 22 states have internal predecessors, (3302), 0 states have call successors, (0), 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 18:48:00,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 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 18:48:00,793 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 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 18:48:00,793 INFO L175 Difference]: Start difference. First operand has 543 places, 583 transitions, 5576 flow. Second operand 22 states and 3302 transitions. [2022-11-18 18:48:00,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 678 transitions, 6891 flow [2022-11-18 18:48:01,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 678 transitions, 6218 flow, removed 197 selfloop flow, removed 26 redundant places. [2022-11-18 18:48:01,198 INFO L231 Difference]: Finished difference. Result has 540 places, 616 transitions, 5739 flow [2022-11-18 18:48:01,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5739, PETRI_PLACES=540, PETRI_TRANSITIONS=616} [2022-11-18 18:48:01,199 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 381 predicate places. [2022-11-18 18:48:01,200 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 616 transitions, 5739 flow [2022-11-18 18:48:01,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 149.375) internal successors, (2390), 16 states have internal predecessors, (2390), 0 states have call successors, (0), 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 18:48:01,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:01,201 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:48:01,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:01,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:48:01,407 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:48:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash 895466730, now seen corresponding path program 1 times [2022-11-18 18:48:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:01,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150072191] [2022-11-18 18:48:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150072191] [2022-11-18 18:48:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150072191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050572389] [2022-11-18 18:48:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:03,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:03,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:03,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:48:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-18 18:48:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:05,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-18 18:48:06,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:48:06,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-18 18:48:09,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2022-11-18 18:48:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:09,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:12,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-18 18:48:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:13,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050572389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:13,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:13,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 32] total 92 [2022-11-18 18:48:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829855278] [2022-11-18 18:48:13,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:13,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-18 18:48:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-18 18:48:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=7663, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 18:48:13,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-18 18:48:13,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 616 transitions, 5739 flow. Second operand has 92 states, 92 states have (on average 98.29347826086956) internal successors, (9043), 92 states have internal predecessors, (9043), 0 states have call successors, (0), 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 18:48:13,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:13,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-18 18:48:13,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:15,633 INFO L130 PetriNetUnfolder]: 7013/28652 cut-off events. [2022-11-18 18:49:15,633 INFO L131 PetriNetUnfolder]: For 62466/62466 co-relation queries the response was YES. [2022-11-18 18:49:15,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83413 conditions, 28652 events. 7013/28652 cut-off events. For 62466/62466 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 293369 event pairs, 1534 based on Foata normal form. 118/28271 useless extension candidates. Maximal degree in co-relation 77628. Up to 5969 conditions per place. [2022-11-18 18:49:16,060 INFO L137 encePairwiseOnDemand]: 136/174 looper letters, 1289 selfloop transitions, 616 changer transitions 90/2079 dead transitions. [2022-11-18 18:49:16,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 2079 transitions, 19742 flow [2022-11-18 18:49:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-18 18:49:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2022-11-18 18:49:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 19511 transitions. [2022-11-18 18:49:16,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5780009479796184 [2022-11-18 18:49:16,085 INFO L72 ComplementDD]: Start complementDD. Operand 194 states and 19511 transitions. [2022-11-18 18:49:16,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 194 states and 19511 transitions. [2022-11-18 18:49:16,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:16,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 194 states and 19511 transitions. [2022-11-18 18:49:16,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 195 states, 194 states have (on average 100.5721649484536) internal successors, (19511), 194 states have internal predecessors, (19511), 0 states have call successors, (0), 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 18:49:16,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 195 states, 195 states have (on average 174.0) internal successors, (33930), 195 states have internal predecessors, (33930), 0 states have call successors, (0), 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 18:49:16,166 INFO L81 ComplementDD]: Finished complementDD. Result has 195 states, 195 states have (on average 174.0) internal successors, (33930), 195 states have internal predecessors, (33930), 0 states have call successors, (0), 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 18:49:16,166 INFO L175 Difference]: Start difference. First operand has 540 places, 616 transitions, 5739 flow. Second operand 194 states and 19511 transitions. [2022-11-18 18:49:16,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 2079 transitions, 19742 flow [2022-11-18 18:49:16,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 2079 transitions, 19205 flow, removed 201 selfloop flow, removed 8 redundant places. [2022-11-18 18:49:16,731 INFO L231 Difference]: Finished difference. Result has 840 places, 1128 transitions, 13173 flow [2022-11-18 18:49:16,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=194, PETRI_FLOW=13173, PETRI_PLACES=840, PETRI_TRANSITIONS=1128} [2022-11-18 18:49:16,733 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 681 predicate places. [2022-11-18 18:49:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1128 transitions, 13173 flow [2022-11-18 18:49:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 98.29347826086956) internal successors, (9043), 92 states have internal predecessors, (9043), 0 states have call successors, (0), 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 18:49:16,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:16,736 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:49:16,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 18:49:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:16,941 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:49:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1826466474, now seen corresponding path program 2 times [2022-11-18 18:49:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417038473] [2022-11-18 18:49:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:20,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417038473] [2022-11-18 18:49:20,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417038473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862619222] [2022-11-18 18:49:20,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:20,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:20,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:49:20,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 18:49:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:20,403 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:49:20,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 18:49:20,420 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:49:20,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:49:21,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-18 18:49:21,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-18 18:49:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:49:23,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-18 18:49:25,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-11-18 18:49:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:26,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:29,701 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_420) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-18 18:49:29,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:29,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 18:49:29,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:29,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 18:49:29,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-18 18:49:31,557 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:49:31,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:49:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-18 18:49:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862619222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:31,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:31,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 96 [2022-11-18 18:49:31,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516757159] [2022-11-18 18:49:31,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:31,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-18 18:49:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-18 18:49:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=8552, Unknown=1, NotChecked=186, Total=9120 [2022-11-18 18:49:31,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2022-11-18 18:49:31,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1128 transitions, 13173 flow. Second operand has 96 states, 96 states have (on average 86.33333333333333) internal successors, (8288), 96 states have internal predecessors, (8288), 0 states have call successors, (0), 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 18:49:31,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:31,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2022-11-18 18:49:31,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:53:48,014 INFO L130 PetriNetUnfolder]: 11490/47132 cut-off events. [2022-11-18 18:53:48,015 INFO L131 PetriNetUnfolder]: For 248139/248139 co-relation queries the response was YES. [2022-11-18 18:53:49,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165575 conditions, 47132 events. 11490/47132 cut-off events. For 248139/248139 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 526666 event pairs, 454 based on Foata normal form. 194/46525 useless extension candidates. Maximal degree in co-relation 165263. Up to 6683 conditions per place. [2022-11-18 18:53:49,651 INFO L137 encePairwiseOnDemand]: 134/174 looper letters, 829 selfloop transitions, 1857 changer transitions 82/2844 dead transitions. [2022-11-18 18:53:49,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1083 places, 2844 transitions, 34406 flow [2022-11-18 18:53:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-11-18 18:53:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2022-11-18 18:53:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 22029 transitions. [2022-11-18 18:53:49,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.500408886465858 [2022-11-18 18:53:49,682 INFO L72 ComplementDD]: Start complementDD. Operand 253 states and 22029 transitions. [2022-11-18 18:53:49,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 22029 transitions. [2022-11-18 18:53:49,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:53:49,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 253 states and 22029 transitions. [2022-11-18 18:53:49,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 254 states, 253 states have (on average 87.07114624505928) internal successors, (22029), 253 states have internal predecessors, (22029), 0 states have call successors, (0), 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 18:53:50,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 254 states, 254 states have (on average 174.0) internal successors, (44196), 254 states have internal predecessors, (44196), 0 states have call successors, (0), 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 18:53:50,050 INFO L81 ComplementDD]: Finished complementDD. Result has 254 states, 254 states have (on average 174.0) internal successors, (44196), 254 states have internal predecessors, (44196), 0 states have call successors, (0), 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 18:53:50,050 INFO L175 Difference]: Start difference. First operand has 840 places, 1128 transitions, 13173 flow. Second operand 253 states and 22029 transitions. [2022-11-18 18:53:50,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1083 places, 2844 transitions, 34406 flow [2022-11-18 18:53:54,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1068 places, 2844 transitions, 33100 flow, removed 632 selfloop flow, removed 15 redundant places. [2022-11-18 18:53:54,506 INFO L231 Difference]: Finished difference. Result has 1081 places, 2144 transitions, 28591 flow [2022-11-18 18:53:54,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12523, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=28591, PETRI_PLACES=1081, PETRI_TRANSITIONS=2144} [2022-11-18 18:53:54,508 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 922 predicate places. [2022-11-18 18:53:54,508 INFO L495 AbstractCegarLoop]: Abstraction has has 1081 places, 2144 transitions, 28591 flow [2022-11-18 18:53:54,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 86.33333333333333) internal successors, (8288), 96 states have internal predecessors, (8288), 0 states have call successors, (0), 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 18:53:54,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:53:54,510 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:54,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:54,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:53:54,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:53:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1632726334, now seen corresponding path program 2 times [2022-11-18 18:53:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:54,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674012227] [2022-11-18 18:53:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:54,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 16 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674012227] [2022-11-18 18:53:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674012227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:53:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491313221] [2022-11-18 18:53:55,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:55,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:53:55,173 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:53:55,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9a5bb1-89f6-4af3-8df2-1b5903822e4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:53:55,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:53:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 16 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:55,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 16 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:56,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491313221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:56,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:53:56,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-11-18 18:53:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314203730] [2022-11-18 18:53:56,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:53:56,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:53:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:53:56,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 174 [2022-11-18 18:53:56,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1081 places, 2144 transitions, 28591 flow. Second operand has 13 states, 13 states have (on average 150.6153846153846) internal successors, (1958), 13 states have internal predecessors, (1958), 0 states have call successors, (0), 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 18:53:56,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:53:56,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 174 [2022-11-18 18:53:56,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand