./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:53:07,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:53:07,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:53:07,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:53:07,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:53:07,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:53:07,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:53:07,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:53:07,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:53:07,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:53:07,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:53:07,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:53:07,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:53:07,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:53:07,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:53:07,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:53:07,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:53:07,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:53:07,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:53:07,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:53:07,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:53:07,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:53:07,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:53:07,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:53:07,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:53:07,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:53:07,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:53:07,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:53:07,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:53:07,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:53:07,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:53:07,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:53:07,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:53:07,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:53:07,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:53:07,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:53:07,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:53:07,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:53:07,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:53:07,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:53:07,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:53:07,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:53:07,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:53:07,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:53:07,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:53:07,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:53:07,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:53:07,380 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:53:07,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:53:07,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:53:07,381 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:53:07,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:53:07,383 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:53:07,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:53:07,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:53:07,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:53:07,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:53:07,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:53:07,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:53:07,384 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:53:07,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:53:07,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:53:07,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:53:07,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:53:07,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:53:07,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:53:07,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:53:07,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:53:07,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:53:07,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:53:07,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:53:07,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:53:07,388 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:53:07,389 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:53:07,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:53:07,389 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_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b [2022-11-18 20:53:07,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:53:07,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:53:07,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:53:07,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:53:07,707 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:53:07,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-11-18 20:53:07,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/data/0a6fc20d8/bf2cf85337e34768843ffc6a21f1744b/FLAGf29daa228 [2022-11-18 20:53:08,380 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:53:08,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-11-18 20:53:08,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/data/0a6fc20d8/bf2cf85337e34768843ffc6a21f1744b/FLAGf29daa228 [2022-11-18 20:53:08,705 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/data/0a6fc20d8/bf2cf85337e34768843ffc6a21f1744b [2022-11-18 20:53:08,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:53:08,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:53:08,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:53:08,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:53:08,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:53:08,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:53:08" (1/1) ... [2022-11-18 20:53:08,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af5981e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:08, skipping insertion in model container [2022-11-18 20:53:08,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:53:08" (1/1) ... [2022-11-18 20:53:08,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:53:08,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:53:09,244 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-11-18 20:53:09,260 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-11-18 20:53:09,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:53:09,284 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:53:09,339 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-11-18 20:53:09,346 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-11-18 20:53:09,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:53:09,407 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:53:09,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09 WrapperNode [2022-11-18 20:53:09,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:53:09,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:53:09,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:53:09,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:53:09,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,465 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 158 [2022-11-18 20:53:09,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:53:09,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:53:09,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:53:09,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:53:09,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:53:09,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:53:09,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:53:09,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:53:09,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (1/1) ... [2022-11-18 20:53:09,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:53:09,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:09,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:53:09,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_233c492c-984a-47f7-9f74-28ca9f5646f0/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:53:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:53:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-18 20:53:09,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-18 20:53:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:53:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:53:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:53:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:53:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:53:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:53:09,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:53:09,605 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:53:09,744 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:53:09,746 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:53:10,183 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:53:10,473 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:53:10,473 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:53:10,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:53:10 BoogieIcfgContainer [2022-11-18 20:53:10,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:53:10,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:53:10,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:53:10,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:53:10,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:53:08" (1/3) ... [2022-11-18 20:53:10,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf35f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:53:10, skipping insertion in model container [2022-11-18 20:53:10,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:09" (2/3) ... [2022-11-18 20:53:10,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf35f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:53:10, skipping insertion in model container [2022-11-18 20:53:10,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:53:10" (3/3) ... [2022-11-18 20:53:10,486 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2022-11-18 20:53:10,494 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:53:10,503 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:53:10,503 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 20:53:10,503 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:53:10,577 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:53:10,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 215 flow [2022-11-18 20:53:10,690 INFO L130 PetriNetUnfolder]: 9/116 cut-off events. [2022-11-18 20:53:10,691 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:53:10,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 116 events. 9/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-11-18 20:53:10,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 215 flow [2022-11-18 20:53:10,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 105 transitions, 215 flow [2022-11-18 20:53:10,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:53:10,728 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;@2389c21a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:53:10,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 20:53:10,745 INFO L130 PetriNetUnfolder]: 2/54 cut-off events. [2022-11-18 20:53:10,746 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:53:10,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:10,748 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:10,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:53:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:10,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1219962900, now seen corresponding path program 1 times [2022-11-18 20:53:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294491647] [2022-11-18 20:53:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:53:10,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:53:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:53:11,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:53:11,024 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:53:11,025 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-18 20:53:11,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-18 20:53:11,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-18 20:53:11,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-18 20:53:11,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-18 20:53:11,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:53:11,030 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-18 20:53:11,039 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:53:11,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:53:11,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:53:11,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 360 flow [2022-11-18 20:53:11,260 INFO L130 PetriNetUnfolder]: 17/198 cut-off events. [2022-11-18 20:53:11,260 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:53:11,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 198 events. 17/198 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 643 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-11-18 20:53:11,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 360 flow [2022-11-18 20:53:11,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 360 flow [2022-11-18 20:53:11,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:53:11,278 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;@2389c21a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:53:11,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 20:53:11,309 INFO L130 PetriNetUnfolder]: 3/90 cut-off events. [2022-11-18 20:53:11,309 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:53:11,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:11,309 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] [2022-11-18 20:53:11,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:53:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:11,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1539837004, now seen corresponding path program 1 times [2022-11-18 20:53:11,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:11,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583376515] [2022-11-18 20:53:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:11,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:11,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583376515] [2022-11-18 20:53:11,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583376515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:11,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:11,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:53:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545483913] [2022-11-18 20:53:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:11,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:53:11,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:53:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:53:11,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 174 [2022-11-18 20:53:11,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 174 transitions, 360 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:11,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:53:11,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 174 [2022-11-18 20:53:11,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:53:11,729 INFO L130 PetriNetUnfolder]: 82/659 cut-off events. [2022-11-18 20:53:11,729 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-18 20:53:11,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 659 events. 82/659 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4389 event pairs, 42 based on Foata normal form. 85/672 useless extension candidates. Maximal degree in co-relation 150. Up to 99 conditions per place. [2022-11-18 20:53:11,736 INFO L137 encePairwiseOnDemand]: 168/174 looper letters, 14 selfloop transitions, 0 changer transitions 0/163 dead transitions. [2022-11-18 20:53:11,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 366 flow [2022-11-18 20:53:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:53:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:53:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 328 transitions. [2022-11-18 20:53:11,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-11-18 20:53:11,752 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 328 transitions. [2022-11-18 20:53:11,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 328 transitions. [2022-11-18 20:53:11,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:53:11,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 328 transitions. [2022-11-18 20:53:11,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:11,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:11,767 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:11,768 INFO L175 Difference]: Start difference. First operand has 164 places, 174 transitions, 360 flow. Second operand 2 states and 328 transitions. [2022-11-18 20:53:11,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 163 transitions, 366 flow [2022-11-18 20:53:11,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 364 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 20:53:11,778 INFO L231 Difference]: Finished difference. Result has 159 places, 163 transitions, 336 flow [2022-11-18 20:53:11,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=336, PETRI_PLACES=159, PETRI_TRANSITIONS=163} [2022-11-18 20:53:11,784 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -5 predicate places. [2022-11-18 20:53:11,784 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 336 flow [2022-11-18 20:53:11,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:11,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:11,785 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:11,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:53:11,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:53:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash -577950060, now seen corresponding path program 1 times [2022-11-18 20:53:11,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:11,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315981673] [2022-11-18 20:53:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:53:11,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:53:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:53:11,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:53:11,875 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:53:11,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-18 20:53:11,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-18 20:53:11,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-18 20:53:11,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-18 20:53:11,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-18 20:53:11,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-18 20:53:11,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-18 20:53:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:53:11,884 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:53:11,885 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:53:11,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:53:12,003 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:53:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 243 transitions, 507 flow [2022-11-18 20:53:12,073 INFO L130 PetriNetUnfolder]: 25/280 cut-off events. [2022-11-18 20:53:12,074 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 20:53:12,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 280 events. 25/280 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1095 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-11-18 20:53:12,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 243 transitions, 507 flow [2022-11-18 20:53:12,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 507 flow [2022-11-18 20:53:12,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:53:12,101 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;@2389c21a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:53:12,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-18 20:53:12,114 INFO L130 PetriNetUnfolder]: 3/86 cut-off events. [2022-11-18 20:53:12,115 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:53:12,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:12,116 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] [2022-11-18 20:53:12,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-18 20:53:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2083868946, now seen corresponding path program 1 times [2022-11-18 20:53:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:12,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122086361] [2022-11-18 20:53:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122086361] [2022-11-18 20:53:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122086361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:12,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:12,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:53:12,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326499069] [2022-11-18 20:53:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:12,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:53:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:53:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:53:12,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 243 [2022-11-18 20:53:12,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 243 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:12,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:53:12,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 243 [2022-11-18 20:53:12,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:53:13,494 INFO L130 PetriNetUnfolder]: 915/4866 cut-off events. [2022-11-18 20:53:13,495 INFO L131 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-11-18 20:53:13,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6266 conditions, 4866 events. 915/4866 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 53444 event pairs, 630 based on Foata normal form. 708/4947 useless extension candidates. Maximal degree in co-relation 789. Up to 1030 conditions per place. [2022-11-18 20:53:13,547 INFO L137 encePairwiseOnDemand]: 235/243 looper letters, 21 selfloop transitions, 0 changer transitions 0/230 dead transitions. [2022-11-18 20:53:13,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 230 transitions, 523 flow [2022-11-18 20:53:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:53:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:53:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-11-18 20:53:13,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9403292181069959 [2022-11-18 20:53:13,553 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-11-18 20:53:13,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-11-18 20:53:13,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:53:13,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-11-18 20:53:13,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:13,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:13,561 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:13,561 INFO L175 Difference]: Start difference. First operand has 228 places, 243 transitions, 507 flow. Second operand 2 states and 457 transitions. [2022-11-18 20:53:13,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 230 transitions, 523 flow [2022-11-18 20:53:13,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 230 transitions, 517 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 20:53:13,575 INFO L231 Difference]: Finished difference. Result has 223 places, 230 transitions, 475 flow [2022-11-18 20:53:13,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=475, PETRI_PLACES=223, PETRI_TRANSITIONS=230} [2022-11-18 20:53:13,577 INFO L288 CegarLoopForPetriNet]: 228 programPoint places, -5 predicate places. [2022-11-18 20:53:13,578 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 230 transitions, 475 flow [2022-11-18 20:53:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:13,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:13,578 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-11-18 20:53:13,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:53:13,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-18 20:53:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1669419765, now seen corresponding path program 1 times [2022-11-18 20:53:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:13,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573134156] [2022-11-18 20:53:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:13,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:53:13,626 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:53:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:53:13,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:53:13,661 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:53:13,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-18 20:53:13,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-11-18 20:53:13,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-11-18 20:53:13,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-11-18 20:53:13,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-11-18 20:53:13,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-11-18 20:53:13,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-11-18 20:53:13,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-11-18 20:53:13,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-11-18 20:53:13,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:53:13,663 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:53:13,664 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:53:13,664 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 20:53:13,794 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:53:13,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 312 transitions, 656 flow [2022-11-18 20:53:13,908 INFO L130 PetriNetUnfolder]: 33/362 cut-off events. [2022-11-18 20:53:13,908 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 20:53:13,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 362 events. 33/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1529 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 288. Up to 10 conditions per place. [2022-11-18 20:53:13,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 312 transitions, 656 flow [2022-11-18 20:53:13,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 312 transitions, 656 flow [2022-11-18 20:53:13,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:53:13,926 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;@2389c21a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:53:13,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-18 20:53:13,937 INFO L130 PetriNetUnfolder]: 3/85 cut-off events. [2022-11-18 20:53:13,937 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:53:13,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:13,938 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] [2022-11-18 20:53:13,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-11-18 20:53:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1404663954, now seen corresponding path program 1 times [2022-11-18 20:53:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165166106] [2022-11-18 20:53:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:13,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:13,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165166106] [2022-11-18 20:53:13,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165166106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:13,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:13,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:53:13,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496746365] [2022-11-18 20:53:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:13,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:53:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:53:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:53:13,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 312 [2022-11-18 20:53:13,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 312 transitions, 656 flow. Second operand has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:13,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:53:13,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 312 [2022-11-18 20:53:13,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:53:22,451 INFO L130 PetriNetUnfolder]: 8804/36373 cut-off events. [2022-11-18 20:53:22,451 INFO L131 PetriNetUnfolder]: For 5804/5804 co-relation queries the response was YES. [2022-11-18 20:53:22,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49289 conditions, 36373 events. 8804/36373 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 530929 event pairs, 6804 based on Foata normal form. 5755/36930 useless extension candidates. Maximal degree in co-relation 6347. Up to 9605 conditions per place. [2022-11-18 20:53:22,957 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 28 selfloop transitions, 0 changer transitions 0/297 dead transitions. [2022-11-18 20:53:22,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 297 transitions, 682 flow [2022-11-18 20:53:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:53:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:53:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 586 transitions. [2022-11-18 20:53:22,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-11-18 20:53:22,961 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 586 transitions. [2022-11-18 20:53:22,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 586 transitions. [2022-11-18 20:53:22,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:53:22,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 586 transitions. [2022-11-18 20:53:22,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 293.0) internal successors, (586), 2 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:22,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:22,966 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:22,966 INFO L175 Difference]: Start difference. First operand has 292 places, 312 transitions, 656 flow. Second operand 2 states and 586 transitions. [2022-11-18 20:53:22,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 297 transitions, 682 flow [2022-11-18 20:53:22,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 297 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 20:53:22,984 INFO L231 Difference]: Finished difference. Result has 287 places, 297 transitions, 614 flow [2022-11-18 20:53:22,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=614, PETRI_PLACES=287, PETRI_TRANSITIONS=297} [2022-11-18 20:53:22,988 INFO L288 CegarLoopForPetriNet]: 292 programPoint places, -5 predicate places. [2022-11-18 20:53:22,991 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 297 transitions, 614 flow [2022-11-18 20:53:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:22,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:53:22,993 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] [2022-11-18 20:53:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:53:22,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-11-18 20:53:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1029256633, now seen corresponding path program 1 times [2022-11-18 20:53:22,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:22,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017765366] [2022-11-18 20:53:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:24,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017765366] [2022-11-18 20:53:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017765366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:24,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 20:53:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081460009] [2022-11-18 20:53:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:24,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:53:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:53:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:53:24,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 312 [2022-11-18 20:53:24,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 297 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 204.14285714285714) internal successors, (2858), 14 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:24,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:53:24,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 312 [2022-11-18 20:53:24,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand