./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a --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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- 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-b5237d8 [2022-11-21 16:08:01,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:08:01,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:08:01,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:08:01,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:08:01,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:08:01,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:08:01,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:08:01,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:08:01,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:08:01,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:08:01,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:08:01,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:08:01,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:08:01,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:08:02,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:08:02,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:08:02,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:08:02,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:08:02,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:08:02,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:08:02,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:08:02,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:08:02,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:08:02,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:08:02,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:08:02,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:08:02,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:08:02,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:08:02,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:08:02,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:08:02,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:08:02,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:08:02,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:08:02,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:08:02,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:08:02,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:08:02,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:08:02,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:08:02,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:08:02,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:08:02,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:08:02,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:08:02,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:08:02,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:08:02,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:08:02,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:08:02,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:08:02,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:08:02,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:08:02,099 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:08:02,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:08:02,101 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:08:02,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:08:02,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:08:02,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:08:02,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:08:02,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:08:02,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:08:02,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:08:02,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:08:02,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:08:02,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:08:02,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:08:02,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:08:02,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:08:02,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:02,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:08:02,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:08:02,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:08:02,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:08:02,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:08:02,106 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:08:02,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:08:02,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:08:02,108 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_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2022-11-21 16:08:02,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:08:02,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:08:02,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:08:02,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:08:02,440 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:08:02,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-21 16:08:05,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:08:06,138 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:08:06,139 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-21 16:08:06,155 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/data/b126891ca/9ca905c245ac4c03a1ce0e8ddfe1a52a/FLAG59602a1cd [2022-11-21 16:08:06,175 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/data/b126891ca/9ca905c245ac4c03a1ce0e8ddfe1a52a [2022-11-21 16:08:06,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:08:06,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:08:06,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:06,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:08:06,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:08:06,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0e205b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06, skipping insertion in model container [2022-11-21 16:08:06,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:08:06,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:08:06,998 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-21 16:08:07,006 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-21 16:08:07,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:07,030 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:08:07,079 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-21 16:08:07,083 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-21 16:08:07,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:07,149 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:08:07,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07 WrapperNode [2022-11-21 16:08:07,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:07,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:07,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:08:07,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:08:07,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,241 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2022-11-21 16:08:07,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:07,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:08:07,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:08:07,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:08:07,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,309 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:08:07,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:08:07,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:08:07,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:08:07,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (1/1) ... [2022-11-21 16:08:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:07,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:07,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:08:07,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:08:07,405 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 16:08:07,405 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 16:08:07,405 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 16:08:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 16:08:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:08:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:08:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:08:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:08:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 16:08:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:08:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:08:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:08:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:08:07,411 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:08:07,663 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:08:07,673 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:08:08,158 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:08:08,169 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:08:08,170 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:08:08,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:08 BoogieIcfgContainer [2022-11-21 16:08:08,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:08:08,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:08:08,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:08:08,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:08:08,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:08:06" (1/3) ... [2022-11-21 16:08:08,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da526ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:08, skipping insertion in model container [2022-11-21 16:08:08,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:07" (2/3) ... [2022-11-21 16:08:08,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da526ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:08, skipping insertion in model container [2022-11-21 16:08:08,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:08" (3/3) ... [2022-11-21 16:08:08,183 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2022-11-21 16:08:08,194 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:08:08,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:08:08,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 16:08:08,204 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:08:08,314 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:08:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 229 transitions, 474 flow [2022-11-21 16:08:08,477 INFO L130 PetriNetUnfolder]: 13/227 cut-off events. [2022-11-21 16:08:08,477 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:08:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 227 events. 13/227 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 367 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2022-11-21 16:08:08,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 229 transitions, 474 flow [2022-11-21 16:08:08,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 217 transitions, 443 flow [2022-11-21 16:08:08,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:08:08,515 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;@2baaec7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:08:08,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:08:08,532 INFO L130 PetriNetUnfolder]: 1/62 cut-off events. [2022-11-21 16:08:08,533 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:08:08,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:08,534 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] [2022-11-21 16:08:08,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1859650148, now seen corresponding path program 1 times [2022-11-21 16:08:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:08,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381578626] [2022-11-21 16:08:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:08,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:08,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:08,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381578626] [2022-11-21 16:08:08,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381578626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:08,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:08,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:08:08,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462548572] [2022-11-21 16:08:08,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:08:08,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:08:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:08:08,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 229 [2022-11-21 16:08:09,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 217 transitions, 443 flow. Second operand has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 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) [2022-11-21 16:08:09,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:09,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 229 [2022-11-21 16:08:09,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:09,123 INFO L130 PetriNetUnfolder]: 9/208 cut-off events. [2022-11-21 16:08:09,124 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-21 16:08:09,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 208 events. 9/208 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 276 event pairs, 0 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 143. Up to 4 conditions per place. [2022-11-21 16:08:09,129 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 3 selfloop transitions, 0 changer transitions 0/208 dead transitions. [2022-11-21 16:08:09,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 208 transitions, 431 flow [2022-11-21 16:08:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:08:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:08:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 443 transitions. [2022-11-21 16:08:09,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9672489082969432 [2022-11-21 16:08:09,153 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 443 transitions. [2022-11-21 16:08:09,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 443 transitions. [2022-11-21 16:08:09,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:09,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 443 transitions. [2022-11-21 16:08:09,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 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) [2022-11-21 16:08:09,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2022-11-21 16:08:09,173 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2022-11-21 16:08:09,176 INFO L175 Difference]: Start difference. First operand has 211 places, 217 transitions, 443 flow. Second operand 2 states and 443 transitions. [2022-11-21 16:08:09,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 208 transitions, 431 flow [2022-11-21 16:08:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:08:09,189 INFO L231 Difference]: Finished difference. Result has 204 places, 208 transitions, 420 flow [2022-11-21 16:08:09,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=420, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-11-21 16:08:09,197 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -7 predicate places. [2022-11-21 16:08:09,198 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 420 flow [2022-11-21 16:08:09,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 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) [2022-11-21 16:08:09,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:09,199 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] [2022-11-21 16:08:09,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:08:09,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1551671927, now seen corresponding path program 1 times [2022-11-21 16:08:09,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:09,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921753114] [2022-11-21 16:08:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:09,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921753114] [2022-11-21 16:08:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921753114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:10,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:10,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 16:08:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547385159] [2022-11-21 16:08:10,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:10,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:08:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:08:10,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:08:10,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 229 [2022-11-21 16:08:10,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 420 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 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) [2022-11-21 16:08:10,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:10,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 229 [2022-11-21 16:08:10,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:12,338 INFO L130 PetriNetUnfolder]: 611/2580 cut-off events. [2022-11-21 16:08:12,339 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-21 16:08:12,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 2580 events. 611/2580 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 20510 event pairs, 459 based on Foata normal form. 0/2409 useless extension candidates. Maximal degree in co-relation 3509. Up to 882 conditions per place. [2022-11-21 16:08:12,363 INFO L137 encePairwiseOnDemand]: 216/229 looper letters, 42 selfloop transitions, 12 changer transitions 0/204 dead transitions. [2022-11-21 16:08:12,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 520 flow [2022-11-21 16:08:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2187 transitions. [2022-11-21 16:08:12,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7346321800470272 [2022-11-21 16:08:12,373 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2187 transitions. [2022-11-21 16:08:12,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2187 transitions. [2022-11-21 16:08:12,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:12,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2187 transitions. [2022-11-21 16:08:12,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.23076923076923) internal successors, (2187), 13 states have internal predecessors, (2187), 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) [2022-11-21 16:08:12,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 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) [2022-11-21 16:08:12,397 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 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) [2022-11-21 16:08:12,397 INFO L175 Difference]: Start difference. First operand has 204 places, 208 transitions, 420 flow. Second operand 13 states and 2187 transitions. [2022-11-21 16:08:12,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 520 flow [2022-11-21 16:08:12,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 204 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:08:12,411 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 436 flow [2022-11-21 16:08:12,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=436, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-21 16:08:12,412 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 2 predicate places. [2022-11-21 16:08:12,413 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 436 flow [2022-11-21 16:08:12,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 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) [2022-11-21 16:08:12,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:12,416 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] [2022-11-21 16:08:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:08:12,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,419 INFO L85 PathProgramCache]: Analyzing trace with hash 63645862, now seen corresponding path program 1 times [2022-11-21 16:08:12,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471060682] [2022-11-21 16:08:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:12,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471060682] [2022-11-21 16:08:12,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471060682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:12,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:12,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:08:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385134950] [2022-11-21 16:08:12,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:08:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:08:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:08:12,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 229 [2022-11-21 16:08:12,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2022-11-21 16:08:12,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:12,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 229 [2022-11-21 16:08:12,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:12,727 INFO L130 PetriNetUnfolder]: 16/305 cut-off events. [2022-11-21 16:08:12,727 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 16:08:12,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 305 events. 16/305 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 690 event pairs, 2 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 344. Up to 12 conditions per place. [2022-11-21 16:08:12,729 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 7 selfloop transitions, 2 changer transitions 5/207 dead transitions. [2022-11-21 16:08:12,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 207 transitions, 469 flow [2022-11-21 16:08:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:08:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:08:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-21 16:08:12,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-21 16:08:12,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-21 16:08:12,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-21 16:08:12,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:12,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-21 16:08:12,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 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) [2022-11-21 16:08:12,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-21 16:08:12,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-21 16:08:12,739 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 436 flow. Second operand 3 states and 649 transitions. [2022-11-21 16:08:12,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 207 transitions, 469 flow [2022-11-21 16:08:12,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 207 transitions, 446 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-21 16:08:12,745 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 415 flow [2022-11-21 16:08:12,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-21 16:08:12,746 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-21 16:08:12,747 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 415 flow [2022-11-21 16:08:12,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2022-11-21 16:08:12,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:12,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:12,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:08:12,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1324891375, now seen corresponding path program 1 times [2022-11-21 16:08:12,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698208440] [2022-11-21 16:08:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:12,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698208440] [2022-11-21 16:08:12,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698208440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:12,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:12,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:08:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26307755] [2022-11-21 16:08:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:08:12,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:08:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:08:12,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 229 [2022-11-21 16:08:12,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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) [2022-11-21 16:08:12,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:12,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 229 [2022-11-21 16:08:12,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:13,010 INFO L130 PetriNetUnfolder]: 20/334 cut-off events. [2022-11-21 16:08:13,011 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:08:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 334 events. 20/334 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 6 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 399. Up to 24 conditions per place. [2022-11-21 16:08:13,013 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 13 selfloop transitions, 2 changer transitions 1/206 dead transitions. [2022-11-21 16:08:13,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 206 transitions, 457 flow [2022-11-21 16:08:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:08:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:08:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-21 16:08:13,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-21 16:08:13,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-21 16:08:13,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-21 16:08:13,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:13,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-21 16:08:13,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 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) [2022-11-21 16:08:13,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-21 16:08:13,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-21 16:08:13,024 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 415 flow. Second operand 3 states and 649 transitions. [2022-11-21 16:08:13,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 206 transitions, 457 flow [2022-11-21 16:08:13,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:08:13,030 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 421 flow [2022-11-21 16:08:13,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-21 16:08:13,032 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-21 16:08:13,032 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 421 flow [2022-11-21 16:08:13,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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) [2022-11-21 16:08:13,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:13,033 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:08:13,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:13,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -637897097, now seen corresponding path program 1 times [2022-11-21 16:08:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:13,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733767104] [2022-11-21 16:08:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:13,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:13,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733767104] [2022-11-21 16:08:13,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733767104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:13,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247396429] [2022-11-21 16:08:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:13,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:13,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:13,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:08:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:08:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:13,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247396429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:13,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:13,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:08:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401337011] [2022-11-21 16:08:13,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:13,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:08:13,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:08:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:13,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-21 16:08:13,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 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) [2022-11-21 16:08:13,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:13,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-21 16:08:13,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:13,892 INFO L130 PetriNetUnfolder]: 30/421 cut-off events. [2022-11-21 16:08:13,892 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 16:08:13,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 421 events. 30/421 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 696 event pairs, 4 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 535. Up to 19 conditions per place. [2022-11-21 16:08:13,895 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 20 selfloop transitions, 9 changer transitions 0/218 dead transitions. [2022-11-21 16:08:13,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 529 flow [2022-11-21 16:08:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:08:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:08:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1921 transitions. [2022-11-21 16:08:13,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9320718098010674 [2022-11-21 16:08:13,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1921 transitions. [2022-11-21 16:08:13,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1921 transitions. [2022-11-21 16:08:13,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:13,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1921 transitions. [2022-11-21 16:08:13,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 213.44444444444446) internal successors, (1921), 9 states have internal predecessors, (1921), 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) [2022-11-21 16:08:13,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 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) [2022-11-21 16:08:13,916 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 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) [2022-11-21 16:08:13,916 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 421 flow. Second operand 9 states and 1921 transitions. [2022-11-21 16:08:13,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 529 flow [2022-11-21 16:08:13,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 218 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:08:13,922 INFO L231 Difference]: Finished difference. Result has 214 places, 207 transitions, 469 flow [2022-11-21 16:08:13,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=214, PETRI_TRANSITIONS=207} [2022-11-21 16:08:13,924 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 3 predicate places. [2022-11-21 16:08:13,924 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 207 transitions, 469 flow [2022-11-21 16:08:13,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 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) [2022-11-21 16:08:13,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:13,926 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:13,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:14,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:14,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash -579238025, now seen corresponding path program 2 times [2022-11-21 16:08:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:14,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054147099] [2022-11-21 16:08:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-21 16:08:14,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:14,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054147099] [2022-11-21 16:08:14,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054147099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:14,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:14,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:08:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626949635] [2022-11-21 16:08:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:08:14,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:08:14,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:08:14,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 229 [2022-11-21 16:08:14,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 207 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2022-11-21 16:08:14,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:14,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 229 [2022-11-21 16:08:14,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:14,608 INFO L130 PetriNetUnfolder]: 25/609 cut-off events. [2022-11-21 16:08:14,608 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-21 16:08:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 609 events. 25/609 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1307 event pairs, 3 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 723. Up to 19 conditions per place. [2022-11-21 16:08:14,612 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 12 selfloop transitions, 3 changer transitions 3/209 dead transitions. [2022-11-21 16:08:14,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 209 transitions, 508 flow [2022-11-21 16:08:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:08:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:08:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-11-21 16:08:14,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9301310043668122 [2022-11-21 16:08:14,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-11-21 16:08:14,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-11-21 16:08:14,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:14,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-11-21 16:08:14,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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) [2022-11-21 16:08:14,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-21 16:08:14,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-21 16:08:14,624 INFO L175 Difference]: Start difference. First operand has 214 places, 207 transitions, 469 flow. Second operand 3 states and 639 transitions. [2022-11-21 16:08:14,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 209 transitions, 508 flow [2022-11-21 16:08:14,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 209 transitions, 502 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-21 16:08:14,632 INFO L231 Difference]: Finished difference. Result has 215 places, 204 transitions, 463 flow [2022-11-21 16:08:14,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=215, PETRI_TRANSITIONS=204} [2022-11-21 16:08:14,633 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 4 predicate places. [2022-11-21 16:08:14,634 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 204 transitions, 463 flow [2022-11-21 16:08:14,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2022-11-21 16:08:14,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:14,635 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:14,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:08:14,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1192919075, now seen corresponding path program 1 times [2022-11-21 16:08:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:14,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627000817] [2022-11-21 16:08:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627000817] [2022-11-21 16:08:15,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627000817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304943066] [2022-11-21 16:08:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:15,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:15,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:15,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:08:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:08:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304943066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:15,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:15,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 16:08:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310925943] [2022-11-21 16:08:15,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:15,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:08:15,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:08:15,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:08:15,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-21 16:08:15,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 204 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 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) [2022-11-21 16:08:15,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:15,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-21 16:08:15,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:16,410 INFO L130 PetriNetUnfolder]: 58/745 cut-off events. [2022-11-21 16:08:16,411 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-21 16:08:16,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 745 events. 58/745 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1387 event pairs, 4 based on Foata normal form. 8/734 useless extension candidates. Maximal degree in co-relation 1045. Up to 39 conditions per place. [2022-11-21 16:08:16,417 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 40 selfloop transitions, 21 changer transitions 1/247 dead transitions. [2022-11-21 16:08:16,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 247 transitions, 761 flow [2022-11-21 16:08:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 16:08:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 16:08:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4475 transitions. [2022-11-21 16:08:16,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9305468912455812 [2022-11-21 16:08:16,429 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4475 transitions. [2022-11-21 16:08:16,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4475 transitions. [2022-11-21 16:08:16,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:16,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4475 transitions. [2022-11-21 16:08:16,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 213.0952380952381) internal successors, (4475), 21 states have internal predecessors, (4475), 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) [2022-11-21 16:08:16,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 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) [2022-11-21 16:08:16,458 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 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) [2022-11-21 16:08:16,458 INFO L175 Difference]: Start difference. First operand has 215 places, 204 transitions, 463 flow. Second operand 21 states and 4475 transitions. [2022-11-21 16:08:16,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 247 transitions, 761 flow [2022-11-21 16:08:16,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 247 transitions, 758 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:08:16,466 INFO L231 Difference]: Finished difference. Result has 236 places, 216 transitions, 588 flow [2022-11-21 16:08:16,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=588, PETRI_PLACES=236, PETRI_TRANSITIONS=216} [2022-11-21 16:08:16,467 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 25 predicate places. [2022-11-21 16:08:16,468 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 216 transitions, 588 flow [2022-11-21 16:08:16,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 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) [2022-11-21 16:08:16,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:16,471 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:16,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:16,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:16,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -387971235, now seen corresponding path program 2 times [2022-11-21 16:08:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:16,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082595427] [2022-11-21 16:08:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:16,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082595427] [2022-11-21 16:08:17,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082595427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417692249] [2022-11-21 16:08:17,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:08:17,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:17,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:17,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:17,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:08:18,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:08:18,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:08:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:18,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:19,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417692249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:19,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:19,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-21 16:08:19,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020488861] [2022-11-21 16:08:19,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:08:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:08:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:08:19,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-21 16:08:19,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 216 transitions, 588 flow. Second operand has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 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) [2022-11-21 16:08:19,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:19,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-21 16:08:19,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:20,846 INFO L130 PetriNetUnfolder]: 114/1391 cut-off events. [2022-11-21 16:08:20,846 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-21 16:08:20,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1391 events. 114/1391 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2837 event pairs, 4 based on Foata normal form. 16/1372 useless extension candidates. Maximal degree in co-relation 2153. Up to 79 conditions per place. [2022-11-21 16:08:20,857 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 80 selfloop transitions, 45 changer transitions 0/310 dead transitions. [2022-11-21 16:08:20,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 310 transitions, 1326 flow [2022-11-21 16:08:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 16:08:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-21 16:08:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 9583 transitions. [2022-11-21 16:08:20,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9299369238233867 [2022-11-21 16:08:20,878 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 9583 transitions. [2022-11-21 16:08:20,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 9583 transitions. [2022-11-21 16:08:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:20,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 9583 transitions. [2022-11-21 16:08:20,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 212.95555555555555) internal successors, (9583), 45 states have internal predecessors, (9583), 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) [2022-11-21 16:08:20,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 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) [2022-11-21 16:08:20,942 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 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) [2022-11-21 16:08:20,942 INFO L175 Difference]: Start difference. First operand has 236 places, 216 transitions, 588 flow. Second operand 45 states and 9583 transitions. [2022-11-21 16:08:20,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 310 transitions, 1326 flow [2022-11-21 16:08:20,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 310 transitions, 1286 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-21 16:08:21,003 INFO L231 Difference]: Finished difference. Result has 282 places, 241 transitions, 866 flow [2022-11-21 16:08:21,003 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=866, PETRI_PLACES=282, PETRI_TRANSITIONS=241} [2022-11-21 16:08:21,007 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 71 predicate places. [2022-11-21 16:08:21,008 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 241 transitions, 866 flow [2022-11-21 16:08:21,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 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) [2022-11-21 16:08:21,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:21,011 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:21,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:21,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 925531131, now seen corresponding path program 3 times [2022-11-21 16:08:21,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:21,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346260171] [2022-11-21 16:08:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 0 proven. 3270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:24,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:24,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346260171] [2022-11-21 16:08:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346260171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517943155] [2022-11-21 16:08:24,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:08:24,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:24,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:24,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:08:24,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:08:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-21 16:08:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:28,351 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 13 treesize of output 9 [2022-11-21 16:08:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:28,486 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 16 treesize of output 18 [2022-11-21 16:08:28,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:08:28,882 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-21 16:08:28,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-21 16:08:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:28,975 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 23 treesize of output 22 [2022-11-21 16:08:29,067 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 19 treesize of output 7 [2022-11-21 16:08:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-21 16:08:29,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:29,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:29,868 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 54 treesize of output 44 [2022-11-21 16:08:29,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:29,881 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 81 treesize of output 83 [2022-11-21 16:08:29,887 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 78 treesize of output 70 [2022-11-21 16:08:29,905 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 8 treesize of output 4 [2022-11-21 16:08:29,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:29,962 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 52 treesize of output 48 [2022-11-21 16:08:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-21 16:08:31,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517943155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:31,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:31,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14, 13] total 56 [2022-11-21 16:08:31,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091980960] [2022-11-21 16:08:31,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:31,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:08:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:08:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2694, Unknown=3, NotChecked=0, Total=3080 [2022-11-21 16:08:31,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 229 [2022-11-21 16:08:31,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 241 transitions, 866 flow. Second operand has 56 states, 56 states have (on average 164.60714285714286) internal successors, (9218), 56 states have internal predecessors, (9218), 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) [2022-11-21 16:08:31,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:31,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 229 [2022-11-21 16:08:31,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:49,431 INFO L130 PetriNetUnfolder]: 2125/7556 cut-off events. [2022-11-21 16:08:49,431 INFO L131 PetriNetUnfolder]: For 2828/2828 co-relation queries the response was YES. [2022-11-21 16:08:49,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 7556 events. 2125/7556 cut-off events. For 2828/2828 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 39971 event pairs, 31 based on Foata normal form. 8/7464 useless extension candidates. Maximal degree in co-relation 15794. Up to 687 conditions per place. [2022-11-21 16:08:49,505 INFO L137 encePairwiseOnDemand]: 205/229 looper letters, 888 selfloop transitions, 408 changer transitions 0/1428 dead transitions. [2022-11-21 16:08:49,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1428 transitions, 6868 flow [2022-11-21 16:08:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-21 16:08:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2022-11-21 16:08:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 32887 transitions. [2022-11-21 16:08:49,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7144843468248279 [2022-11-21 16:08:49,567 INFO L72 ComplementDD]: Start complementDD. Operand 201 states and 32887 transitions. [2022-11-21 16:08:49,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 201 states and 32887 transitions. [2022-11-21 16:08:49,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:49,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 201 states and 32887 transitions. [2022-11-21 16:08:49,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 202 states, 201 states have (on average 163.61691542288557) internal successors, (32887), 201 states have internal predecessors, (32887), 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) [2022-11-21 16:08:49,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 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) [2022-11-21 16:08:49,819 INFO L81 ComplementDD]: Finished complementDD. Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 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) [2022-11-21 16:08:49,824 INFO L175 Difference]: Start difference. First operand has 282 places, 241 transitions, 866 flow. Second operand 201 states and 32887 transitions. [2022-11-21 16:08:49,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1428 transitions, 6868 flow [2022-11-21 16:08:49,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1428 transitions, 6753 flow, removed 22 selfloop flow, removed 18 redundant places. [2022-11-21 16:08:49,868 INFO L231 Difference]: Finished difference. Result has 548 places, 680 transitions, 3716 flow [2022-11-21 16:08:49,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=201, PETRI_FLOW=3716, PETRI_PLACES=548, PETRI_TRANSITIONS=680} [2022-11-21 16:08:49,870 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 337 predicate places. [2022-11-21 16:08:49,870 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 680 transitions, 3716 flow [2022-11-21 16:08:49,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 164.60714285714286) internal successors, (9218), 56 states have internal predecessors, (9218), 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) [2022-11-21 16:08:49,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:49,877 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:49,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:50,085 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:08:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1400767172, now seen corresponding path program 1 times [2022-11-21 16:08:50,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:50,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923889046] [2022-11-21 16:08:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:50,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:52,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:52,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923889046] [2022-11-21 16:08:52,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923889046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:52,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518310759] [2022-11-21 16:08:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:52,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:52,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:52,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:52,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:08:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:08:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:54,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:56,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518310759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:56,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:56,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2022-11-21 16:08:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459600453] [2022-11-21 16:08:56,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-21 16:08:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-21 16:08:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2022-11-21 16:08:56,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-21 16:08:56,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 680 transitions, 3716 flow. Second operand has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 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) [2022-11-21 16:08:56,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:56,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-21 16:08:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:09:05,768 INFO L130 PetriNetUnfolder]: 960/8286 cut-off events. [2022-11-21 16:09:05,768 INFO L131 PetriNetUnfolder]: For 129353/129385 co-relation queries the response was YES. [2022-11-21 16:09:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28566 conditions, 8286 events. 960/8286 cut-off events. For 129353/129385 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 37484 event pairs, 7 based on Foata normal form. 102/8380 useless extension candidates. Maximal degree in co-relation 28458. Up to 590 conditions per place. [2022-11-21 16:09:05,879 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 170 selfloop transitions, 162 changer transitions 0/905 dead transitions. [2022-11-21 16:09:05,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 905 transitions, 6052 flow [2022-11-21 16:09:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-21 16:09:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-21 16:09:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 21076 transitions. [2022-11-21 16:09:05,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9296458030082484 [2022-11-21 16:09:05,908 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 21076 transitions. [2022-11-21 16:09:05,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 21076 transitions. [2022-11-21 16:09:05,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:09:05,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 21076 transitions. [2022-11-21 16:09:05,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 212.88888888888889) internal successors, (21076), 99 states have internal predecessors, (21076), 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) [2022-11-21 16:09:06,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 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) [2022-11-21 16:09:06,012 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 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) [2022-11-21 16:09:06,013 INFO L175 Difference]: Start difference. First operand has 548 places, 680 transitions, 3716 flow. Second operand 99 states and 21076 transitions. [2022-11-21 16:09:06,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 905 transitions, 6052 flow [2022-11-21 16:09:06,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 905 transitions, 5866 flow, removed 4 selfloop flow, removed 48 redundant places. [2022-11-21 16:09:06,546 INFO L231 Difference]: Finished difference. Result has 616 places, 747 transitions, 4800 flow [2022-11-21 16:09:06,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=4800, PETRI_PLACES=616, PETRI_TRANSITIONS=747} [2022-11-21 16:09:06,549 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 405 predicate places. [2022-11-21 16:09:06,549 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 747 transitions, 4800 flow [2022-11-21 16:09:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 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) [2022-11-21 16:09:06,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:09:06,553 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:09:06,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:06,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:09:06,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:09:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash -946801939, now seen corresponding path program 2 times [2022-11-21 16:09:06,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458225216] [2022-11-21 16:09:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458225216] [2022-11-21 16:09:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458225216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406875793] [2022-11-21 16:09:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:09:16,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:16,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:16,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:16,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:09:16,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:09:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:09:16,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-21 16:09:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:18,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:24,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406875793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:24,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:24,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 138 [2022-11-21 16:09:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100868437] [2022-11-21 16:09:24,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-21 16:09:24,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-21 16:09:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4830, Invalid=14076, Unknown=0, NotChecked=0, Total=18906 [2022-11-21 16:09:24,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-21 16:09:24,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 747 transitions, 4800 flow. Second operand has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 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) [2022-11-21 16:09:24,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:09:24,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-21 16:09:24,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:09:57,869 INFO L130 PetriNetUnfolder]: 1878/16582 cut-off events. [2022-11-21 16:09:57,869 INFO L131 PetriNetUnfolder]: For 356536/356602 co-relation queries the response was YES. [2022-11-21 16:09:58,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59841 conditions, 16582 events. 1878/16582 cut-off events. For 356536/356602 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 75910 event pairs, 7 based on Foata normal form. 204/16778 useless extension candidates. Maximal degree in co-relation 59716. Up to 1474 conditions per place. [2022-11-21 16:09:58,228 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 340 selfloop transitions, 298 changer transitions 0/1211 dead transitions. [2022-11-21 16:09:58,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 1211 transitions, 10180 flow [2022-11-21 16:09:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-21 16:09:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2022-11-21 16:09:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 42785 transitions. [2022-11-21 16:09:58,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.929522692215777 [2022-11-21 16:09:58,271 INFO L72 ComplementDD]: Start complementDD. Operand 201 states and 42785 transitions. [2022-11-21 16:09:58,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 201 states and 42785 transitions. [2022-11-21 16:09:58,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:09:58,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 201 states and 42785 transitions. [2022-11-21 16:09:58,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 202 states, 201 states have (on average 212.86069651741295) internal successors, (42785), 201 states have internal predecessors, (42785), 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) [2022-11-21 16:09:58,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 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) [2022-11-21 16:09:58,423 INFO L81 ComplementDD]: Finished complementDD. Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 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) [2022-11-21 16:09:58,423 INFO L175 Difference]: Start difference. First operand has 616 places, 747 transitions, 4800 flow. Second operand 201 states and 42785 transitions. [2022-11-21 16:09:58,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 1211 transitions, 10180 flow [2022-11-21 16:09:59,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 1211 transitions, 9683 flow, removed 156 selfloop flow, removed 47 redundant places. [2022-11-21 16:09:59,863 INFO L231 Difference]: Finished difference. Result has 804 places, 884 transitions, 7241 flow [2022-11-21 16:09:59,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=201, PETRI_FLOW=7241, PETRI_PLACES=804, PETRI_TRANSITIONS=884} [2022-11-21 16:09:59,865 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 593 predicate places. [2022-11-21 16:09:59,865 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 884 transitions, 7241 flow [2022-11-21 16:09:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 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) [2022-11-21 16:09:59,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:09:59,869 INFO L209 CegarLoopForPetriNet]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:09:59,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:00,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:10:00,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:10:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -389632542, now seen corresponding path program 3 times [2022-11-21 16:10:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971371390] [2022-11-21 16:10:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:38,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:38,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971371390] [2022-11-21 16:10:38,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971371390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:38,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391303302] [2022-11-21 16:10:38,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:10:38,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:38,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:38,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef89700-3e5b-4c5d-9d46-911e984cdbb5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:10:38,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:10:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-21 16:10:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:02,003 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 13 treesize of output 9 [2022-11-21 16:11:02,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:11:02,246 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 16 treesize of output 18 [2022-11-21 16:11:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:11:03,068 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-21 16:11:03,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-21 16:11:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:11:03,230 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 23 treesize of output 22 [2022-11-21 16:11:03,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 31 treesize of output 15 [2022-11-21 16:11:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:11:04,119 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 16 treesize of output 18 [2022-11-21 16:11:04,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:11:04,867 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-21 16:11:04,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-21 16:11:04,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:11:04,987 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 23 treesize of output 22 [2022-11-21 16:11:05,077 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 19 treesize of output 7 [2022-11-21 16:11:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 4139 proven. 1521 refuted. 0 times theorem prover too weak. 62816 trivial. 0 not checked. [2022-11-21 16:11:05,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:06,756 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) (+ 1 |c_t1Thread1of1ForFork0_enqueue_#t~post41#1|))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1))) (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1)))))) is different from false [2022-11-21 16:11:07,150 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1)))))) is different from false [2022-11-21 16:11:07,250 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse3 (+ (select .cse2 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1)))))) is different from false [2022-11-21 16:11:07,319 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2807)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse3 (+ (select .cse2 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1)))))) is different from false [2022-11-21 16:11:07,352 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| Int)) (let ((.cse1 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604)) (.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| (select .cse0 .cse1))) (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse4 (store .cse0 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2807))) (store (store .cse4 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse1 (+ (select .cse4 .cse1) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse3 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse2 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse3))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse2 .cse3))))))))) is different from false [2022-11-21 16:11:07,408 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| Int) (v_ArrVal_2809 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| Int)) (let ((.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset| 1604)) (.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_#in~q#1.base|))) (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_#in~q#1.base| (let ((.cse4 (store .cse2 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| 4) |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset|) v_ArrVal_2807))) (store (store .cse4 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset|) v_ArrVal_2809) .cse3 (+ (select .cse4 .cse3) 1)))) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (= 400 (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| 4)) v_ArrVal_2815) .cse1))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| (select .cse2 .cse3))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_238| (select .cse0 .cse1))))))) is different from false [2022-11-21 16:11:08,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:08,834 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 209 treesize of output 149 [2022-11-21 16:11:08,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:08,850 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 275 treesize of output 273 [2022-11-21 16:11:08,863 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 253 treesize of output 237 [2022-11-21 16:11:08,884 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 275 treesize of output 263 [2022-11-21 16:11:08,905 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 8 treesize of output 4 [2022-11-21 16:11:09,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:09,045 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 97 treesize of output 89 [2022-11-21 16:11:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 3133 proven. 1501 refuted. 6 times theorem prover too weak. 62816 trivial. 1020 not checked. [2022-11-21 16:11:17,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391303302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:17,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:17,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 19, 22] total 174 [2022-11-21 16:11:17,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558267685] [2022-11-21 16:11:17,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:17,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-11-21 16:11:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-11-21 16:11:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4964, Invalid=23093, Unknown=23, NotChecked=2022, Total=30102 [2022-11-21 16:11:17,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 229 [2022-11-21 16:11:17,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 884 transitions, 7241 flow. Second operand has 174 states, 174 states have (on average 163.59195402298852) internal successors, (28465), 174 states have internal predecessors, (28465), 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) [2022-11-21 16:11:17,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:11:17,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 229 [2022-11-21 16:11:17,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand