./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.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_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/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_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/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_45fe5be1-4ebe-4540-a354-088cc0765da1/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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:43:01,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:43:01,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:43:01,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:43:01,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:43:01,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:43:01,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:43:01,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:43:01,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:43:01,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:43:01,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:43:01,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:43:01,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:43:01,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:43:01,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:43:01,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:43:01,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:43:01,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:43:01,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:43:01,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:43:01,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:43:01,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:43:01,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:43:01,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:43:01,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:43:01,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:43:01,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:43:01,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:43:01,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:43:01,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:43:01,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:43:01,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:43:01,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:43:01,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:43:01,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:43:01,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:43:01,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:43:01,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:43:01,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:43:01,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:43:01,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:43:01,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:43:01,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:43:01,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:43:01,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:43:01,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:43:01,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:43:01,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:43:01,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:43:01,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:43:01,421 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:43:01,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:43:01,423 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:43:01,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:43:01,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:43:01,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:43:01,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:43:01,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:43:01,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:43:01,425 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:43:01,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:43:01,425 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:43:01,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:43:01,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:43:01,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:43:01,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:43:01,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:43:01,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:43:01,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:43:01,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:43:01,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:43:01,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:43:01,429 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:43:01,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:43:01,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:43:01,430 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_45fe5be1-4ebe-4540-a354-088cc0765da1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2022-11-18 18:43:01,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:43:01,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:43:01,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:43:01,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:43:01,834 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:43:01,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-11-18 18:43:01,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/data/a15635d00/3381e85780cb4c258d348f07a0e5d621/FLAG345b119c0 [2022-11-18 18:43:02,659 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:43:02,659 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-11-18 18:43:02,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/data/a15635d00/3381e85780cb4c258d348f07a0e5d621/FLAG345b119c0 [2022-11-18 18:43:02,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/data/a15635d00/3381e85780cb4c258d348f07a0e5d621 [2022-11-18 18:43:02,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:43:02,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:43:02,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:43:02,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:43:02,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:43:02,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:43:02" (1/1) ... [2022-11-18 18:43:02,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e11a826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:02, skipping insertion in model container [2022-11-18 18:43:02,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:43:02" (1/1) ... [2022-11-18 18:43:02,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:43:02,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:43:03,446 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_45fe5be1-4ebe-4540-a354-088cc0765da1/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2022-11-18 18:43:03,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:43:03,502 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:43:03,566 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_45fe5be1-4ebe-4540-a354-088cc0765da1/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2022-11-18 18:43:03,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:43:03,645 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:43:03,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03 WrapperNode [2022-11-18 18:43:03,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:43:03,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:43:03,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:43:03,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:43:03,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,733 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-18 18:43:03,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:43:03,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:43:03,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:43:03,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:43:03,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:43:03,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:43:03,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:43:03,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:43:03,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (1/1) ... [2022-11-18 18:43:03,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:43:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:03,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:43:03,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:43:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:43:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:43:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:43:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:43:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:43:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 18:43:03,911 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 18:43:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:43:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:43:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:43:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:43:03,914 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:43:04,178 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:43:04,181 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:43:04,554 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:43:04,563 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:43:04,564 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-18 18:43:04,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:43:04 BoogieIcfgContainer [2022-11-18 18:43:04,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:43:04,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:43:04,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:43:04,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:43:04,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:43:02" (1/3) ... [2022-11-18 18:43:04,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f535890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:43:04, skipping insertion in model container [2022-11-18 18:43:04,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:43:03" (2/3) ... [2022-11-18 18:43:04,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f535890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:43:04, skipping insertion in model container [2022-11-18 18:43:04,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:43:04" (3/3) ... [2022-11-18 18:43:04,582 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2022-11-18 18:43:04,594 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:43:04,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:43:04,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:43:04,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:43:04,695 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 18:43:04,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-11-18 18:43:04,805 INFO L130 PetriNetUnfolder]: 17/161 cut-off events. [2022-11-18 18:43:04,805 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:43:04,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 17/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 384 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-11-18 18:43:04,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2022-11-18 18:43:04,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2022-11-18 18:43:04,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:04,835 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:04,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:04,896 INFO L130 PetriNetUnfolder]: 5/91 cut-off events. [2022-11-18 18:43:04,896 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:04,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:04,897 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] [2022-11-18 18:43:04,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1792536937, now seen corresponding path program 1 times [2022-11-18 18:43:04,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:04,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668931436] [2022-11-18 18:43:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:04,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:05,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:05,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668931436] [2022-11-18 18:43:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668931436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:05,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:05,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655615293] [2022-11-18 18:43:05,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:05,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:05,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 123 [2022-11-18 18:43:05,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 118 transitions, 241 flow. Second operand has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:05,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 123 [2022-11-18 18:43:05,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:05,351 INFO L130 PetriNetUnfolder]: 0/138 cut-off events. [2022-11-18 18:43:05,352 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:43:05,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 138 events. 0/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 213 event pairs, 0 based on Foata normal form. 16/148 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-18 18:43:05,354 INFO L137 encePairwiseOnDemand]: 112/123 looper letters, 1 selfloop transitions, 0 changer transitions 16/106 dead transitions. [2022-11-18 18:43:05,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 219 flow [2022-11-18 18:43:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2022-11-18 18:43:05,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-11-18 18:43:05,382 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2022-11-18 18:43:05,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2022-11-18 18:43:05,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:05,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2022-11-18 18:43:05,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,401 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,404 INFO L175 Difference]: Start difference. First operand has 110 places, 118 transitions, 241 flow. Second operand 2 states and 230 transitions. [2022-11-18 18:43:05,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 219 flow [2022-11-18 18:43:05,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:05,414 INFO L231 Difference]: Finished difference. Result has 110 places, 90 transitions, 185 flow [2022-11-18 18:43:05,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=110, PETRI_TRANSITIONS=90} [2022-11-18 18:43:05,422 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-11-18 18:43:05,423 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 90 transitions, 185 flow [2022-11-18 18:43:05,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:05,424 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] [2022-11-18 18:43:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:43:05,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1663454218, now seen corresponding path program 1 times [2022-11-18 18:43:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:05,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498289282] [2022-11-18 18:43:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:05,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498289282] [2022-11-18 18:43:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498289282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:05,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:05,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694862410] [2022-11-18 18:43:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:05,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:05,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:05,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 123 [2022-11-18 18:43:05,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 90 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:05,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 123 [2022-11-18 18:43:05,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:05,714 INFO L130 PetriNetUnfolder]: 0/94 cut-off events. [2022-11-18 18:43:05,714 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:05,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 0/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-18 18:43:05,715 INFO L137 encePairwiseOnDemand]: 120/123 looper letters, 8 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-11-18 18:43:05,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 209 flow [2022-11-18 18:43:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-11-18 18:43:05,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8590785907859079 [2022-11-18 18:43:05,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-11-18 18:43:05,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-11-18 18:43:05,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:05,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-11-18 18:43:05,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,725 INFO L175 Difference]: Start difference. First operand has 110 places, 90 transitions, 185 flow. Second operand 3 states and 317 transitions. [2022-11-18 18:43:05,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 209 flow [2022-11-18 18:43:05,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:05,728 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 193 flow [2022-11-18 18:43:05,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-11-18 18:43:05,730 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -13 predicate places. [2022-11-18 18:43:05,730 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 193 flow [2022-11-18 18:43:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:05,731 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:05,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:05,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:43:05,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash 729322914, now seen corresponding path program 1 times [2022-11-18 18:43:05,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:05,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646713060] [2022-11-18 18:43:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:05,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:05,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:05,890 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:05,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:05,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:05,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:43:05,896 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-18 18:43:05,903 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:05,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 18:43:05,963 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:43:05,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-11-18 18:43:06,052 INFO L130 PetriNetUnfolder]: 31/259 cut-off events. [2022-11-18 18:43:06,053 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:43:06,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 31/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 780 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2022-11-18 18:43:06,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 334 flow [2022-11-18 18:43:06,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 334 flow [2022-11-18 18:43:06,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:06,067 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:06,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:06,088 INFO L130 PetriNetUnfolder]: 3/87 cut-off events. [2022-11-18 18:43:06,088 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:06,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:06,088 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] [2022-11-18 18:43:06,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash 378560535, now seen corresponding path program 1 times [2022-11-18 18:43:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:06,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299660773] [2022-11-18 18:43:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299660773] [2022-11-18 18:43:06,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299660773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:06,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:06,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:06,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659746514] [2022-11-18 18:43:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:06,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:06,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:06,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:06,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 158 [2022-11-18 18:43:06,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 334 flow. Second operand has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:06,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 158 [2022-11-18 18:43:06,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:06,273 INFO L130 PetriNetUnfolder]: 3/228 cut-off events. [2022-11-18 18:43:06,273 INFO L131 PetriNetUnfolder]: For 20/26 co-relation queries the response was YES. [2022-11-18 18:43:06,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 228 events. 3/228 cut-off events. For 20/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 571 event pairs, 0 based on Foata normal form. 42/260 useless extension candidates. Maximal degree in co-relation 147. Up to 7 conditions per place. [2022-11-18 18:43:06,275 INFO L137 encePairwiseOnDemand]: 141/158 looper letters, 2 selfloop transitions, 0 changer transitions 22/140 dead transitions. [2022-11-18 18:43:06,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 140 transitions, 306 flow [2022-11-18 18:43:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-11-18 18:43:06,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9272151898734177 [2022-11-18 18:43:06,279 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-11-18 18:43:06,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-11-18 18:43:06,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:06,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-11-18 18:43:06,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,284 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,285 INFO L175 Difference]: Start difference. First operand has 144 places, 158 transitions, 334 flow. Second operand 2 states and 293 transitions. [2022-11-18 18:43:06,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 140 transitions, 306 flow [2022-11-18 18:43:06,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 140 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:06,289 INFO L231 Difference]: Finished difference. Result has 144 places, 118 transitions, 248 flow [2022-11-18 18:43:06,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=144, PETRI_TRANSITIONS=118} [2022-11-18 18:43:06,291 INFO L288 CegarLoopForPetriNet]: 144 programPoint places, 0 predicate places. [2022-11-18 18:43:06,292 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 118 transitions, 248 flow [2022-11-18 18:43:06,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:06,293 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] [2022-11-18 18:43:06,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:43:06,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 507643254, now seen corresponding path program 1 times [2022-11-18 18:43:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:06,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528040134] [2022-11-18 18:43:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528040134] [2022-11-18 18:43:06,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528040134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:06,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:06,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:06,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646445737] [2022-11-18 18:43:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:06,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:06,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:06,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 158 [2022-11-18 18:43:06,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 118 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:06,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 158 [2022-11-18 18:43:06,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:06,433 INFO L130 PetriNetUnfolder]: 0/143 cut-off events. [2022-11-18 18:43:06,433 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:43:06,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 143 events. 0/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-18 18:43:06,434 INFO L137 encePairwiseOnDemand]: 155/158 looper letters, 11 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2022-11-18 18:43:06,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 282 flow [2022-11-18 18:43:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-11-18 18:43:06,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8459915611814346 [2022-11-18 18:43:06,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-11-18 18:43:06,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-11-18 18:43:06,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:06,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-11-18 18:43:06,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 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) [2022-11-18 18:43:06,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 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) [2022-11-18 18:43:06,447 INFO L175 Difference]: Start difference. First operand has 144 places, 118 transitions, 248 flow. Second operand 3 states and 401 transitions. [2022-11-18 18:43:06,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 282 flow [2022-11-18 18:43:06,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 122 transitions, 280 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:06,454 INFO L231 Difference]: Finished difference. Result has 127 places, 119 transitions, 258 flow [2022-11-18 18:43:06,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=127, PETRI_TRANSITIONS=119} [2022-11-18 18:43:06,457 INFO L288 CegarLoopForPetriNet]: 144 programPoint places, -17 predicate places. [2022-11-18 18:43:06,458 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 119 transitions, 258 flow [2022-11-18 18:43:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:06,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:06,459 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] [2022-11-18 18:43:06,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:43:06,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash 572610218, now seen corresponding path program 1 times [2022-11-18 18:43:06,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:06,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643329049] [2022-11-18 18:43:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:06,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:06,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:06,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643329049] [2022-11-18 18:43:06,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643329049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:06,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452634292] [2022-11-18 18:43:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:06,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:06,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:06,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:06,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:43:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:07,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:07,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452634292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:07,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:07,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395057227] [2022-11-18 18:43:07,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:07,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:07,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 158 [2022-11-18 18:43:07,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 119 transitions, 258 flow. Second operand has 10 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:07,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 158 [2022-11-18 18:43:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:07,272 INFO L130 PetriNetUnfolder]: 0/119 cut-off events. [2022-11-18 18:43:07,272 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 18:43:07,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 119 events. 0/119 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-18 18:43:07,274 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 9 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2022-11-18 18:43:07,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 276 flow [2022-11-18 18:43:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1170 transitions. [2022-11-18 18:43:07,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8227848101265823 [2022-11-18 18:43:07,279 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1170 transitions. [2022-11-18 18:43:07,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1170 transitions. [2022-11-18 18:43:07,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:07,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1170 transitions. [2022-11-18 18:43:07,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.0) internal successors, (1170), 9 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,290 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,291 INFO L175 Difference]: Start difference. First operand has 127 places, 119 transitions, 258 flow. Second operand 9 states and 1170 transitions. [2022-11-18 18:43:07,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 276 flow [2022-11-18 18:43:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 113 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:07,298 INFO L231 Difference]: Finished difference. Result has 122 places, 109 transitions, 248 flow [2022-11-18 18:43:07,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=248, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2022-11-18 18:43:07,304 INFO L288 CegarLoopForPetriNet]: 144 programPoint places, -22 predicate places. [2022-11-18 18:43:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 248 flow [2022-11-18 18:43:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:07,308 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:07,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:07,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:43:07,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash -584472305, now seen corresponding path program 1 times [2022-11-18 18:43:07,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:07,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773192542] [2022-11-18 18:43:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:07,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:07,542 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:07,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:07,569 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:07,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:07,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:07,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:43:07,570 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 18:43:07,571 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:07,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 18:43:07,606 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 18:43:07,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-11-18 18:43:07,684 INFO L130 PetriNetUnfolder]: 50/390 cut-off events. [2022-11-18 18:43:07,684 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 18:43:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1338 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2022-11-18 18:43:07,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 193 transitions, 416 flow [2022-11-18 18:43:07,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 193 transitions, 416 flow [2022-11-18 18:43:07,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:07,696 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:07,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:07,715 INFO L130 PetriNetUnfolder]: 3/87 cut-off events. [2022-11-18 18:43:07,719 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:07,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:07,720 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] [2022-11-18 18:43:07,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1128453289, now seen corresponding path program 1 times [2022-11-18 18:43:07,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95221481] [2022-11-18 18:43:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:07,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:07,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95221481] [2022-11-18 18:43:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95221481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:07,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:07,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500800188] [2022-11-18 18:43:07,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:07,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:07,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:07,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 193 [2022-11-18 18:43:07,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 193 transitions, 416 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:07,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 193 [2022-11-18 18:43:07,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:07,909 INFO L130 PetriNetUnfolder]: 8/344 cut-off events. [2022-11-18 18:43:07,909 INFO L131 PetriNetUnfolder]: For 55/69 co-relation queries the response was YES. [2022-11-18 18:43:07,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 344 events. 8/344 cut-off events. For 55/69 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1090 event pairs, 1 based on Foata normal form. 104/432 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2022-11-18 18:43:07,913 INFO L137 encePairwiseOnDemand]: 170/193 looper letters, 3 selfloop transitions, 0 changer transitions 23/169 dead transitions. [2022-11-18 18:43:07,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 380 flow [2022-11-18 18:43:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 355 transitions. [2022-11-18 18:43:07,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9196891191709845 [2022-11-18 18:43:07,916 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 355 transitions. [2022-11-18 18:43:07,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 355 transitions. [2022-11-18 18:43:07,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:07,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 355 transitions. [2022-11-18 18:43:07,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.5) internal successors, (355), 2 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,920 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,920 INFO L175 Difference]: Start difference. First operand has 174 places, 193 transitions, 416 flow. Second operand 2 states and 355 transitions. [2022-11-18 18:43:07,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 380 flow [2022-11-18 18:43:07,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 169 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:07,929 INFO L231 Difference]: Finished difference. Result has 174 places, 146 transitions, 313 flow [2022-11-18 18:43:07,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=313, PETRI_PLACES=174, PETRI_TRANSITIONS=146} [2022-11-18 18:43:07,931 INFO L288 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2022-11-18 18:43:07,931 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 146 transitions, 313 flow [2022-11-18 18:43:07,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:07,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:07,935 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] [2022-11-18 18:43:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:43:07,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash -999370570, now seen corresponding path program 1 times [2022-11-18 18:43:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:07,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843673796] [2022-11-18 18:43:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:07,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:08,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843673796] [2022-11-18 18:43:08,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843673796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:08,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:08,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:08,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259876246] [2022-11-18 18:43:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:08,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:08,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:08,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 193 [2022-11-18 18:43:08,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 146 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:08,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 193 [2022-11-18 18:43:08,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:08,132 INFO L130 PetriNetUnfolder]: 0/192 cut-off events. [2022-11-18 18:43:08,132 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:43:08,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 192 events. 0/192 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-18 18:43:08,133 INFO L137 encePairwiseOnDemand]: 190/193 looper letters, 12 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2022-11-18 18:43:08,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 349 flow [2022-11-18 18:43:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-11-18 18:43:08,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8341968911917098 [2022-11-18 18:43:08,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-11-18 18:43:08,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-11-18 18:43:08,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:08,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-11-18 18:43:08,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,141 INFO L175 Difference]: Start difference. First operand has 174 places, 146 transitions, 313 flow. Second operand 3 states and 483 transitions. [2022-11-18 18:43:08,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 349 flow [2022-11-18 18:43:08,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:08,146 INFO L231 Difference]: Finished difference. Result has 157 places, 147 transitions, 319 flow [2022-11-18 18:43:08,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=157, PETRI_TRANSITIONS=147} [2022-11-18 18:43:08,147 INFO L288 CegarLoopForPetriNet]: 174 programPoint places, -17 predicate places. [2022-11-18 18:43:08,147 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 147 transitions, 319 flow [2022-11-18 18:43:08,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:08,148 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] [2022-11-18 18:43:08,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:43:08,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1688494217, now seen corresponding path program 1 times [2022-11-18 18:43:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:08,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541645579] [2022-11-18 18:43:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:08,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541645579] [2022-11-18 18:43:08,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541645579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213971713] [2022-11-18 18:43:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:08,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:08,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:08,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:43:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:08,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213971713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:08,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:08,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404430423] [2022-11-18 18:43:08,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:08,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 193 [2022-11-18 18:43:08,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 147 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:08,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 193 [2022-11-18 18:43:08,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:08,710 INFO L130 PetriNetUnfolder]: 0/168 cut-off events. [2022-11-18 18:43:08,710 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:43:08,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 168 events. 0/168 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 255 event pairs, 0 based on Foata normal form. 2/170 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-18 18:43:08,711 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 13 selfloop transitions, 9 changer transitions 0/157 dead transitions. [2022-11-18 18:43:08,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 157 transitions, 385 flow [2022-11-18 18:43:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1419 transitions. [2022-11-18 18:43:08,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8169257340241797 [2022-11-18 18:43:08,716 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1419 transitions. [2022-11-18 18:43:08,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1419 transitions. [2022-11-18 18:43:08,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:08,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1419 transitions. [2022-11-18 18:43:08,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.66666666666666) internal successors, (1419), 9 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,726 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,727 INFO L175 Difference]: Start difference. First operand has 157 places, 147 transitions, 319 flow. Second operand 9 states and 1419 transitions. [2022-11-18 18:43:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 157 transitions, 385 flow [2022-11-18 18:43:08,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 157 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:08,732 INFO L231 Difference]: Finished difference. Result has 167 places, 153 transitions, 367 flow [2022-11-18 18:43:08,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=167, PETRI_TRANSITIONS=153} [2022-11-18 18:43:08,734 INFO L288 CegarLoopForPetriNet]: 174 programPoint places, -7 predicate places. [2022-11-18 18:43:08,735 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 153 transitions, 367 flow [2022-11-18 18:43:08,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:08,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:08,736 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-11-18 18:43:08,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:08,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:43:08,945 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash -359203390, now seen corresponding path program 1 times [2022-11-18 18:43:08,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515515693] [2022-11-18 18:43:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:08,995 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:09,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:09,049 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:09,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:09,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:09,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:43:09,050 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 18:43:09,051 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:09,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 18:43:09,129 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 18:43:09,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-11-18 18:43:09,311 INFO L130 PetriNetUnfolder]: 81/589 cut-off events. [2022-11-18 18:43:09,311 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 18:43:09,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 589 events. 81/589 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2296 event pairs, 6 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2022-11-18 18:43:09,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 500 flow [2022-11-18 18:43:09,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 500 flow [2022-11-18 18:43:09,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:09,333 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:09,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:09,344 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:09,344 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:09,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:09,344 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] [2022-11-18 18:43:09,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2018611113, now seen corresponding path program 1 times [2022-11-18 18:43:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:09,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190277301] [2022-11-18 18:43:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:09,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:09,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190277301] [2022-11-18 18:43:09,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190277301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:09,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:09,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:09,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326499254] [2022-11-18 18:43:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:09,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:09,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:09,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 228 [2022-11-18 18:43:09,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 228 transitions, 500 flow. Second operand has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:09,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 228 [2022-11-18 18:43:09,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:09,565 INFO L130 PetriNetUnfolder]: 21/524 cut-off events. [2022-11-18 18:43:09,566 INFO L131 PetriNetUnfolder]: For 130/152 co-relation queries the response was YES. [2022-11-18 18:43:09,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 524 events. 21/524 cut-off events. For 130/152 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2084 event pairs, 6 based on Foata normal form. 248/746 useless extension candidates. Maximal degree in co-relation 379. Up to 37 conditions per place. [2022-11-18 18:43:09,573 INFO L137 encePairwiseOnDemand]: 199/228 looper letters, 4 selfloop transitions, 0 changer transitions 24/198 dead transitions. [2022-11-18 18:43:09,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 198 transitions, 456 flow [2022-11-18 18:43:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 417 transitions. [2022-11-18 18:43:09,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9144736842105263 [2022-11-18 18:43:09,576 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 417 transitions. [2022-11-18 18:43:09,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 417 transitions. [2022-11-18 18:43:09,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:09,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 417 transitions. [2022-11-18 18:43:09,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,580 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,581 INFO L175 Difference]: Start difference. First operand has 204 places, 228 transitions, 500 flow. Second operand 2 states and 417 transitions. [2022-11-18 18:43:09,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 198 transitions, 456 flow [2022-11-18 18:43:09,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 198 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:09,586 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 380 flow [2022-11-18 18:43:09,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=380, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2022-11-18 18:43:09,588 INFO L288 CegarLoopForPetriNet]: 204 programPoint places, 0 predicate places. [2022-11-18 18:43:09,588 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 380 flow [2022-11-18 18:43:09,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:09,589 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] [2022-11-18 18:43:09,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:43:09,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1889528394, now seen corresponding path program 1 times [2022-11-18 18:43:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484733795] [2022-11-18 18:43:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:09,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484733795] [2022-11-18 18:43:09,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484733795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:09,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:09,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109208195] [2022-11-18 18:43:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:09,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 228 [2022-11-18 18:43:09,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:09,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 228 [2022-11-18 18:43:09,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:09,747 INFO L130 PetriNetUnfolder]: 0/241 cut-off events. [2022-11-18 18:43:09,747 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 18:43:09,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 241 events. 0/241 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 583 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-18 18:43:09,749 INFO L137 encePairwiseOnDemand]: 225/228 looper letters, 13 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2022-11-18 18:43:09,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 178 transitions, 418 flow [2022-11-18 18:43:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-18 18:43:09,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8260233918128655 [2022-11-18 18:43:09,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-18 18:43:09,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-18 18:43:09,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:09,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-18 18:43:09,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,758 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 380 flow. Second operand 3 states and 565 transitions. [2022-11-18 18:43:09,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 178 transitions, 418 flow [2022-11-18 18:43:09,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 406 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:09,763 INFO L231 Difference]: Finished difference. Result has 187 places, 175 transitions, 380 flow [2022-11-18 18:43:09,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=187, PETRI_TRANSITIONS=175} [2022-11-18 18:43:09,765 INFO L288 CegarLoopForPetriNet]: 204 programPoint places, -17 predicate places. [2022-11-18 18:43:09,765 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 175 transitions, 380 flow [2022-11-18 18:43:09,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:09,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:09,766 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] [2022-11-18 18:43:09,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:43:09,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1018242552, now seen corresponding path program 1 times [2022-11-18 18:43:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728614344] [2022-11-18 18:43:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:09,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728614344] [2022-11-18 18:43:09,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728614344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:09,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343565078] [2022-11-18 18:43:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:09,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:09,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:09,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:09,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:43:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:10,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:10,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343565078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:10,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:10,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315497655] [2022-11-18 18:43:10,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:10,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-11-18 18:43:10,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 175 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 184.3) internal successors, (1843), 10 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:10,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:10,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-11-18 18:43:10,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:10,260 INFO L130 PetriNetUnfolder]: 0/217 cut-off events. [2022-11-18 18:43:10,261 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:43:10,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 217 events. 0/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 440 event pairs, 0 based on Foata normal form. 2/219 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-18 18:43:10,262 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 14 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-11-18 18:43:10,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 185 transitions, 448 flow [2022-11-18 18:43:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2022-11-18 18:43:10,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8104288499025342 [2022-11-18 18:43:10,268 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2022-11-18 18:43:10,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2022-11-18 18:43:10,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:10,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2022-11-18 18:43:10,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:10,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 228.0) internal successors, (2280), 10 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:10,280 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 228.0) internal successors, (2280), 10 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:10,281 INFO L175 Difference]: Start difference. First operand has 187 places, 175 transitions, 380 flow. Second operand 9 states and 1663 transitions. [2022-11-18 18:43:10,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 185 transitions, 448 flow [2022-11-18 18:43:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 185 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:10,286 INFO L231 Difference]: Finished difference. Result has 197 places, 181 transitions, 428 flow [2022-11-18 18:43:10,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=197, PETRI_TRANSITIONS=181} [2022-11-18 18:43:10,288 INFO L288 CegarLoopForPetriNet]: 204 programPoint places, -7 predicate places. [2022-11-18 18:43:10,288 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 181 transitions, 428 flow [2022-11-18 18:43:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.3) internal successors, (1843), 10 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:10,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:10,290 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:10,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:43:10,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1078848823, now seen corresponding path program 1 times [2022-11-18 18:43:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:10,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416049627] [2022-11-18 18:43:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:10,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416049627] [2022-11-18 18:43:10,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416049627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:10,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603294652] [2022-11-18 18:43:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:10,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:10,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:10,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:43:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:43:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:10,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603294652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:11,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:43:11,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962923554] [2022-11-18 18:43:11,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:11,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:43:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:43:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:11,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-11-18 18:43:11,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 181 transitions, 428 flow. Second operand has 18 states, 18 states have (on average 184.61111111111111) internal successors, (3323), 18 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:11,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:11,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-11-18 18:43:11,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:11,397 INFO L130 PetriNetUnfolder]: 0/193 cut-off events. [2022-11-18 18:43:11,398 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 18:43:11,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 193 events. 0/193 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-18 18:43:11,399 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 15 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2022-11-18 18:43:11,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 179 transitions, 492 flow [2022-11-18 18:43:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:43:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 18:43:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2760 transitions. [2022-11-18 18:43:11,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8070175438596491 [2022-11-18 18:43:11,407 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2760 transitions. [2022-11-18 18:43:11,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2760 transitions. [2022-11-18 18:43:11,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:11,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2760 transitions. [2022-11-18 18:43:11,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:11,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:11,426 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:11,426 INFO L175 Difference]: Start difference. First operand has 197 places, 181 transitions, 428 flow. Second operand 15 states and 2760 transitions. [2022-11-18 18:43:11,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 179 transitions, 492 flow [2022-11-18 18:43:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 179 transitions, 475 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-18 18:43:11,432 INFO L231 Difference]: Finished difference. Result has 195 places, 172 transitions, 424 flow [2022-11-18 18:43:11,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=424, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2022-11-18 18:43:11,433 INFO L288 CegarLoopForPetriNet]: 204 programPoint places, -9 predicate places. [2022-11-18 18:43:11,433 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 424 flow [2022-11-18 18:43:11,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 184.61111111111111) internal successors, (3323), 18 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:11,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:11,436 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:11,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:43:11,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2011390235, now seen corresponding path program 1 times [2022-11-18 18:43:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:11,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412687020] [2022-11-18 18:43:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:11,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:11,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:11,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:11,729 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:11,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:11,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:43:11,731 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:43:11,735 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:11,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 18:43:11,784 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-18 18:43:11,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 263 transitions, 586 flow [2022-11-18 18:43:12,017 INFO L130 PetriNetUnfolder]: 140/928 cut-off events. [2022-11-18 18:43:12,018 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 18:43:12,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 928 events. 140/928 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4276 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 634. Up to 80 conditions per place. [2022-11-18 18:43:12,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 263 transitions, 586 flow [2022-11-18 18:43:12,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 263 transitions, 586 flow [2022-11-18 18:43:12,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:12,052 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:12,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:12,062 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:12,062 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:12,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:12,063 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] [2022-11-18 18:43:12,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2003054359, now seen corresponding path program 1 times [2022-11-18 18:43:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:12,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244388737] [2022-11-18 18:43:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:12,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:12,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:12,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244388737] [2022-11-18 18:43:12,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244388737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:12,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:12,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:12,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527060293] [2022-11-18 18:43:12,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:12,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:12,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:12,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 263 [2022-11-18 18:43:12,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 263 transitions, 586 flow. Second operand has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:12,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 263 [2022-11-18 18:43:12,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:12,398 INFO L130 PetriNetUnfolder]: 54/836 cut-off events. [2022-11-18 18:43:12,399 INFO L131 PetriNetUnfolder]: For 295/325 co-relation queries the response was YES. [2022-11-18 18:43:12,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 836 events. 54/836 cut-off events. For 295/325 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3955 event pairs, 23 based on Foata normal form. 574/1366 useless extension candidates. Maximal degree in co-relation 605. Up to 86 conditions per place. [2022-11-18 18:43:12,410 INFO L137 encePairwiseOnDemand]: 228/263 looper letters, 5 selfloop transitions, 0 changer transitions 25/227 dead transitions. [2022-11-18 18:43:12,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 227 transitions, 534 flow [2022-11-18 18:43:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-11-18 18:43:12,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9106463878326996 [2022-11-18 18:43:12,413 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-11-18 18:43:12,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-11-18 18:43:12,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:12,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-11-18 18:43:12,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,418 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,418 INFO L175 Difference]: Start difference. First operand has 234 places, 263 transitions, 586 flow. Second operand 2 states and 479 transitions. [2022-11-18 18:43:12,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 227 transitions, 534 flow [2022-11-18 18:43:12,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 227 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:12,424 INFO L231 Difference]: Finished difference. Result has 234 places, 202 transitions, 449 flow [2022-11-18 18:43:12,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=449, PETRI_PLACES=234, PETRI_TRANSITIONS=202} [2022-11-18 18:43:12,426 INFO L288 CegarLoopForPetriNet]: 234 programPoint places, 0 predicate places. [2022-11-18 18:43:12,426 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 202 transitions, 449 flow [2022-11-18 18:43:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:12,427 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] [2022-11-18 18:43:12,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:43:12,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2132137078, now seen corresponding path program 1 times [2022-11-18 18:43:12,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:12,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345081623] [2022-11-18 18:43:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:12,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345081623] [2022-11-18 18:43:12,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345081623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:12,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:12,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554243819] [2022-11-18 18:43:12,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:12,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:12,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:12,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 263 [2022-11-18 18:43:12,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 202 transitions, 449 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:12,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 263 [2022-11-18 18:43:12,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:12,565 INFO L130 PetriNetUnfolder]: 0/290 cut-off events. [2022-11-18 18:43:12,565 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 18:43:12,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 290 events. 0/290 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 769 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-18 18:43:12,567 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 14 selfloop transitions, 2 changer transitions 0/206 dead transitions. [2022-11-18 18:43:12,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 206 transitions, 489 flow [2022-11-18 18:43:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2022-11-18 18:43:12,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8200253485424588 [2022-11-18 18:43:12,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2022-11-18 18:43:12,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2022-11-18 18:43:12,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:12,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2022-11-18 18:43:12,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,576 INFO L175 Difference]: Start difference. First operand has 234 places, 202 transitions, 449 flow. Second operand 3 states and 647 transitions. [2022-11-18 18:43:12,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 206 transitions, 489 flow [2022-11-18 18:43:12,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 206 transitions, 469 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:12,582 INFO L231 Difference]: Finished difference. Result has 217 places, 203 transitions, 441 flow [2022-11-18 18:43:12,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=217, PETRI_TRANSITIONS=203} [2022-11-18 18:43:12,583 INFO L288 CegarLoopForPetriNet]: 234 programPoint places, -17 predicate places. [2022-11-18 18:43:12,584 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 203 transitions, 441 flow [2022-11-18 18:43:12,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:12,586 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] [2022-11-18 18:43:12,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:43:12,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1042334503, now seen corresponding path program 1 times [2022-11-18 18:43:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:12,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265587876] [2022-11-18 18:43:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:12,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265587876] [2022-11-18 18:43:12,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265587876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982140377] [2022-11-18 18:43:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:12,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:12,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:12,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:43:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:12,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:12,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:12,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982140377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:12,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:12,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407841464] [2022-11-18 18:43:12,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:12,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-11-18 18:43:12,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 203 transitions, 441 flow. Second operand has 10 states, 10 states have (on average 211.3) internal successors, (2113), 10 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:12,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:12,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-11-18 18:43:12,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:13,199 INFO L130 PetriNetUnfolder]: 0/266 cut-off events. [2022-11-18 18:43:13,200 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:43:13,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 266 events. 0/266 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 624 event pairs, 0 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:43:13,213 INFO L137 encePairwiseOnDemand]: 257/263 looper letters, 15 selfloop transitions, 9 changer transitions 0/213 dead transitions. [2022-11-18 18:43:13,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 213 transitions, 511 flow [2022-11-18 18:43:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1907 transitions. [2022-11-18 18:43:13,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8056611744824672 [2022-11-18 18:43:13,220 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1907 transitions. [2022-11-18 18:43:13,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1907 transitions. [2022-11-18 18:43:13,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:13,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1907 transitions. [2022-11-18 18:43:13,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.88888888888889) internal successors, (1907), 9 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:13,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:13,243 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:13,243 INFO L175 Difference]: Start difference. First operand has 217 places, 203 transitions, 441 flow. Second operand 9 states and 1907 transitions. [2022-11-18 18:43:13,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 213 transitions, 511 flow [2022-11-18 18:43:13,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 213 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:13,249 INFO L231 Difference]: Finished difference. Result has 227 places, 209 transitions, 489 flow [2022-11-18 18:43:13,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=227, PETRI_TRANSITIONS=209} [2022-11-18 18:43:13,250 INFO L288 CegarLoopForPetriNet]: 234 programPoint places, -7 predicate places. [2022-11-18 18:43:13,251 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 489 flow [2022-11-18 18:43:13,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.3) internal successors, (2113), 10 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:13,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:13,252 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:13,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:13,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash 49823846, now seen corresponding path program 1 times [2022-11-18 18:43:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:13,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204808512] [2022-11-18 18:43:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204808512] [2022-11-18 18:43:13,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204808512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:13,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226966678] [2022-11-18 18:43:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:13,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:13,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:13,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:43:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:13,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:43:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:13,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:14,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226966678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:14,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:14,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:43:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243161272] [2022-11-18 18:43:14,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:43:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:43:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:14,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-11-18 18:43:14,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 209 transitions, 489 flow. Second operand has 18 states, 18 states have (on average 211.61111111111111) internal successors, (3809), 18 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:14,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:14,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-11-18 18:43:14,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:14,409 INFO L130 PetriNetUnfolder]: 0/230 cut-off events. [2022-11-18 18:43:14,410 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-18 18:43:14,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 230 events. 0/230 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 405 event pairs, 0 based on Foata normal form. 3/233 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-18 18:43:14,411 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 18 selfloop transitions, 16 changer transitions 0/212 dead transitions. [2022-11-18 18:43:14,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 212 transitions, 589 flow [2022-11-18 18:43:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:43:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:43:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3799 transitions. [2022-11-18 18:43:14,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8024926066751161 [2022-11-18 18:43:14,422 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3799 transitions. [2022-11-18 18:43:14,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3799 transitions. [2022-11-18 18:43:14,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:14,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3799 transitions. [2022-11-18 18:43:14,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 211.05555555555554) internal successors, (3799), 18 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:14,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 263.0) internal successors, (4997), 19 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:14,447 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 263.0) internal successors, (4997), 19 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:14,448 INFO L175 Difference]: Start difference. First operand has 227 places, 209 transitions, 489 flow. Second operand 18 states and 3799 transitions. [2022-11-18 18:43:14,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 212 transitions, 589 flow [2022-11-18 18:43:14,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 212 transitions, 568 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-18 18:43:14,454 INFO L231 Difference]: Finished difference. Result has 228 places, 203 transitions, 504 flow [2022-11-18 18:43:14,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=203} [2022-11-18 18:43:14,455 INFO L288 CegarLoopForPetriNet]: 234 programPoint places, -6 predicate places. [2022-11-18 18:43:14,455 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 203 transitions, 504 flow [2022-11-18 18:43:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 211.61111111111111) internal successors, (3809), 18 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:14,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:14,457 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:14,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:14,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:14,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1168146554, now seen corresponding path program 1 times [2022-11-18 18:43:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:14,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814080654] [2022-11-18 18:43:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:14,706 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:14,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:14,750 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:14,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:14,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 18:43:14,753 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:43:14,754 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:14,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-18 18:43:14,803 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-18 18:43:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 298 transitions, 674 flow [2022-11-18 18:43:15,303 INFO L130 PetriNetUnfolder]: 263/1555 cut-off events. [2022-11-18 18:43:15,303 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-18 18:43:15,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 1555 events. 263/1555 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8741 event pairs, 72 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1027. Up to 192 conditions per place. [2022-11-18 18:43:15,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 298 transitions, 674 flow [2022-11-18 18:43:15,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 298 transitions, 674 flow [2022-11-18 18:43:15,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:15,365 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:15,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:15,375 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:15,375 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:15,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:15,376 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] [2022-11-18 18:43:15,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1948358761, now seen corresponding path program 1 times [2022-11-18 18:43:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566677686] [2022-11-18 18:43:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:15,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:15,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566677686] [2022-11-18 18:43:15,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566677686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:15,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:15,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682376209] [2022-11-18 18:43:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:15,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:15,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 298 [2022-11-18 18:43:15,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 298 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:15,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 298 [2022-11-18 18:43:15,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:15,918 INFO L130 PetriNetUnfolder]: 135/1420 cut-off events. [2022-11-18 18:43:15,918 INFO L131 PetriNetUnfolder]: For 657/691 co-relation queries the response was YES. [2022-11-18 18:43:15,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 1420 events. 135/1420 cut-off events. For 657/691 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8375 event pairs, 72 based on Foata normal form. 1306/2648 useless extension candidates. Maximal degree in co-relation 1020. Up to 199 conditions per place. [2022-11-18 18:43:15,937 INFO L137 encePairwiseOnDemand]: 257/298 looper letters, 6 selfloop transitions, 0 changer transitions 26/256 dead transitions. [2022-11-18 18:43:15,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 256 transitions, 614 flow [2022-11-18 18:43:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 541 transitions. [2022-11-18 18:43:15,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9077181208053692 [2022-11-18 18:43:15,939 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 541 transitions. [2022-11-18 18:43:15,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 541 transitions. [2022-11-18 18:43:15,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:15,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 541 transitions. [2022-11-18 18:43:15,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 270.5) internal successors, (541), 2 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,944 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,944 INFO L175 Difference]: Start difference. First operand has 264 places, 298 transitions, 674 flow. Second operand 2 states and 541 transitions. [2022-11-18 18:43:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 256 transitions, 614 flow [2022-11-18 18:43:15,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 256 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:15,949 INFO L231 Difference]: Finished difference. Result has 264 places, 230 transitions, 520 flow [2022-11-18 18:43:15,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=520, PETRI_PLACES=264, PETRI_TRANSITIONS=230} [2022-11-18 18:43:15,950 INFO L288 CegarLoopForPetriNet]: 264 programPoint places, 0 predicate places. [2022-11-18 18:43:15,951 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 230 transitions, 520 flow [2022-11-18 18:43:15,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:15,951 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] [2022-11-18 18:43:15,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 18:43:15,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1819276042, now seen corresponding path program 1 times [2022-11-18 18:43:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:15,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478784058] [2022-11-18 18:43:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:15,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:15,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:15,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478784058] [2022-11-18 18:43:15,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478784058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:15,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:15,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:15,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627496068] [2022-11-18 18:43:15,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:15,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:15,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:15,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 298 [2022-11-18 18:43:15,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 230 transitions, 520 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:15,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:15,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 298 [2022-11-18 18:43:15,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:16,114 INFO L130 PetriNetUnfolder]: 0/339 cut-off events. [2022-11-18 18:43:16,115 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-18 18:43:16,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 339 events. 0/339 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 951 event pairs, 0 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-18 18:43:16,117 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 15 selfloop transitions, 2 changer transitions 0/234 dead transitions. [2022-11-18 18:43:16,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 234 transitions, 562 flow [2022-11-18 18:43:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2022-11-18 18:43:16,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154362416107382 [2022-11-18 18:43:16,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2022-11-18 18:43:16,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2022-11-18 18:43:16,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:16,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2022-11-18 18:43:16,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 18:43:16,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,128 INFO L175 Difference]: Start difference. First operand has 264 places, 230 transitions, 520 flow. Second operand 3 states and 729 transitions. [2022-11-18 18:43:16,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 234 transitions, 562 flow [2022-11-18 18:43:16,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:16,135 INFO L231 Difference]: Finished difference. Result has 247 places, 231 transitions, 502 flow [2022-11-18 18:43:16,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=247, PETRI_TRANSITIONS=231} [2022-11-18 18:43:16,136 INFO L288 CegarLoopForPetriNet]: 264 programPoint places, -17 predicate places. [2022-11-18 18:43:16,136 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 231 transitions, 502 flow [2022-11-18 18:43:16,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:16,137 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] [2022-11-18 18:43:16,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 18:43:16,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash -719709210, now seen corresponding path program 1 times [2022-11-18 18:43:16,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:16,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635618748] [2022-11-18 18:43:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:16,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635618748] [2022-11-18 18:43:16,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635618748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338454255] [2022-11-18 18:43:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:16,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:16,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:16,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:43:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:16,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:16,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:16,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338454255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:16,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:16,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723193444] [2022-11-18 18:43:16,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:16,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-11-18 18:43:16,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 231 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:16,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-11-18 18:43:16,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:16,641 INFO L130 PetriNetUnfolder]: 0/315 cut-off events. [2022-11-18 18:43:16,642 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 18:43:16,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 315 events. 0/315 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 810 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-18 18:43:16,643 INFO L137 encePairwiseOnDemand]: 292/298 looper letters, 16 selfloop transitions, 9 changer transitions 0/241 dead transitions. [2022-11-18 18:43:16,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 241 transitions, 574 flow [2022-11-18 18:43:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2022-11-18 18:43:16,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.802013422818792 [2022-11-18 18:43:16,650 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2022-11-18 18:43:16,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2022-11-18 18:43:16,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:16,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2022-11-18 18:43:16,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,662 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,663 INFO L175 Difference]: Start difference. First operand has 247 places, 231 transitions, 502 flow. Second operand 9 states and 2151 transitions. [2022-11-18 18:43:16,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 241 transitions, 574 flow [2022-11-18 18:43:16,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 241 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:16,668 INFO L231 Difference]: Finished difference. Result has 257 places, 237 transitions, 550 flow [2022-11-18 18:43:16,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=257, PETRI_TRANSITIONS=237} [2022-11-18 18:43:16,669 INFO L288 CegarLoopForPetriNet]: 264 programPoint places, -7 predicate places. [2022-11-18 18:43:16,669 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 237 transitions, 550 flow [2022-11-18 18:43:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:16,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:16,671 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:16,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 18:43:16,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 161759587, now seen corresponding path program 1 times [2022-11-18 18:43:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:16,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579272017] [2022-11-18 18:43:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579272017] [2022-11-18 18:43:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579272017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490346579] [2022-11-18 18:43:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:17,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:17,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:43:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:43:17,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:17,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:17,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490346579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:17,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:17,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:43:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906844282] [2022-11-18 18:43:17,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:17,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:43:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:43:17,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:17,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-11-18 18:43:17,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 237 transitions, 550 flow. Second operand has 18 states, 18 states have (on average 238.61111111111111) internal successors, (4295), 18 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:17,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:17,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-11-18 18:43:17,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:17,881 INFO L130 PetriNetUnfolder]: 0/267 cut-off events. [2022-11-18 18:43:17,882 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 18:43:17,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 267 events. 0/267 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 509 event pairs, 0 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-18 18:43:17,883 INFO L137 encePairwiseOnDemand]: 293/298 looper letters, 21 selfloop transitions, 19 changer transitions 0/245 dead transitions. [2022-11-18 18:43:17,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 245 transitions, 686 flow [2022-11-18 18:43:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:43:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:43:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5000 transitions. [2022-11-18 18:43:17,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7989773090444231 [2022-11-18 18:43:17,893 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5000 transitions. [2022-11-18 18:43:17,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5000 transitions. [2022-11-18 18:43:17,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:17,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5000 transitions. [2022-11-18 18:43:17,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 238.0952380952381) internal successors, (5000), 21 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:17,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 298.0) internal successors, (6556), 22 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:17,926 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 298.0) internal successors, (6556), 22 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:17,927 INFO L175 Difference]: Start difference. First operand has 257 places, 237 transitions, 550 flow. Second operand 21 states and 5000 transitions. [2022-11-18 18:43:17,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 245 transitions, 686 flow [2022-11-18 18:43:17,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 245 transitions, 661 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-18 18:43:17,933 INFO L231 Difference]: Finished difference. Result has 261 places, 234 transitions, 584 flow [2022-11-18 18:43:17,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=584, PETRI_PLACES=261, PETRI_TRANSITIONS=234} [2022-11-18 18:43:17,934 INFO L288 CegarLoopForPetriNet]: 264 programPoint places, -3 predicate places. [2022-11-18 18:43:17,935 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 234 transitions, 584 flow [2022-11-18 18:43:17,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 238.61111111111111) internal successors, (4295), 18 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:17,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:17,937 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:17,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:18,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 18:43:18,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 206235967, now seen corresponding path program 1 times [2022-11-18 18:43:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144836163] [2022-11-18 18:43:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:18,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:18,227 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:18,227 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:18,228 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:18,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:18,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 18:43:18,228 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:43:18,232 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:18,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-18 18:43:18,293 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-18 18:43:18,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 333 transitions, 764 flow [2022-11-18 18:43:19,318 INFO L130 PetriNetUnfolder]: 530/2774 cut-off events. [2022-11-18 18:43:19,318 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-18 18:43:19,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 2774 events. 530/2774 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 18713 event pairs, 201 based on Foata normal form. 0/2428 useless extension candidates. Maximal degree in co-relation 1773. Up to 448 conditions per place. [2022-11-18 18:43:19,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 333 transitions, 764 flow [2022-11-18 18:43:19,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 333 transitions, 764 flow [2022-11-18 18:43:19,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:19,414 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:19,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:19,422 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:19,423 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:19,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:19,423 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] [2022-11-18 18:43:19,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash -987948585, now seen corresponding path program 1 times [2022-11-18 18:43:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:19,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551901971] [2022-11-18 18:43:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551901971] [2022-11-18 18:43:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551901971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:19,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:19,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851260658] [2022-11-18 18:43:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:19,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:19,448 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 333 [2022-11-18 18:43:19,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 333 transitions, 764 flow. Second operand has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:19,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:19,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 333 [2022-11-18 18:43:19,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:20,719 INFO L130 PetriNetUnfolder]: 328/2564 cut-off events. [2022-11-18 18:43:20,719 INFO L131 PetriNetUnfolder]: For 1461/1503 co-relation queries the response was YES. [2022-11-18 18:43:20,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 2564 events. 328/2564 cut-off events. For 1461/1503 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18296 event pairs, 201 based on Foata normal form. 2940/5360 useless extension candidates. Maximal degree in co-relation 1836. Up to 456 conditions per place. [2022-11-18 18:43:20,758 INFO L137 encePairwiseOnDemand]: 286/333 looper letters, 7 selfloop transitions, 0 changer transitions 27/285 dead transitions. [2022-11-18 18:43:20,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 285 transitions, 696 flow [2022-11-18 18:43:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 603 transitions. [2022-11-18 18:43:20,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9054054054054054 [2022-11-18 18:43:20,761 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 603 transitions. [2022-11-18 18:43:20,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 603 transitions. [2022-11-18 18:43:20,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:20,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 603 transitions. [2022-11-18 18:43:20,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 301.5) internal successors, (603), 2 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,766 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,766 INFO L175 Difference]: Start difference. First operand has 294 places, 333 transitions, 764 flow. Second operand 2 states and 603 transitions. [2022-11-18 18:43:20,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 285 transitions, 696 flow [2022-11-18 18:43:20,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 285 transitions, 696 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:20,775 INFO L231 Difference]: Finished difference. Result has 294 places, 258 transitions, 593 flow [2022-11-18 18:43:20,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=593, PETRI_PLACES=294, PETRI_TRANSITIONS=258} [2022-11-18 18:43:20,776 INFO L288 CegarLoopForPetriNet]: 294 programPoint places, 0 predicate places. [2022-11-18 18:43:20,776 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 258 transitions, 593 flow [2022-11-18 18:43:20,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:20,777 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] [2022-11-18 18:43:20,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 18:43:20,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -858865866, now seen corresponding path program 1 times [2022-11-18 18:43:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:20,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167827032] [2022-11-18 18:43:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167827032] [2022-11-18 18:43:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167827032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:20,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:20,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338755548] [2022-11-18 18:43:20,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:20,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 333 [2022-11-18 18:43:20,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 258 transitions, 593 flow. Second operand has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:20,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 333 [2022-11-18 18:43:20,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:20,974 INFO L130 PetriNetUnfolder]: 0/388 cut-off events. [2022-11-18 18:43:20,974 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-18 18:43:20,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 388 events. 0/388 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1137 event pairs, 0 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-18 18:43:20,976 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 16 selfloop transitions, 2 changer transitions 0/262 dead transitions. [2022-11-18 18:43:20,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 262 transitions, 637 flow [2022-11-18 18:43:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 811 transitions. [2022-11-18 18:43:20,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118118118118118 [2022-11-18 18:43:20,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 811 transitions. [2022-11-18 18:43:20,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 811 transitions. [2022-11-18 18:43:20,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:20,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 811 transitions. [2022-11-18 18:43:20,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,985 INFO L175 Difference]: Start difference. First operand has 294 places, 258 transitions, 593 flow. Second operand 3 states and 811 transitions. [2022-11-18 18:43:20,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 262 transitions, 637 flow [2022-11-18 18:43:20,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 262 transitions, 595 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:20,991 INFO L231 Difference]: Finished difference. Result has 277 places, 259 transitions, 563 flow [2022-11-18 18:43:20,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=563, PETRI_PLACES=277, PETRI_TRANSITIONS=259} [2022-11-18 18:43:20,994 INFO L288 CegarLoopForPetriNet]: 294 programPoint places, -17 predicate places. [2022-11-18 18:43:20,995 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 259 transitions, 563 flow [2022-11-18 18:43:20,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:20,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:20,996 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] [2022-11-18 18:43:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 18:43:20,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2009406395, now seen corresponding path program 1 times [2022-11-18 18:43:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:20,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811274929] [2022-11-18 18:43:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:20,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:21,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811274929] [2022-11-18 18:43:21,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811274929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276076891] [2022-11-18 18:43:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:21,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:21,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:21,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:43:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:21,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276076891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:21,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:21,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:21,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952305017] [2022-11-18 18:43:21,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:21,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:21,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-11-18 18:43:21,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 259 transitions, 563 flow. Second operand has 10 states, 10 states have (on average 265.3) internal successors, (2653), 10 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:21,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:21,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-11-18 18:43:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:21,621 INFO L130 PetriNetUnfolder]: 0/364 cut-off events. [2022-11-18 18:43:21,621 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-18 18:43:21,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 364 events. 0/364 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 994 event pairs, 0 based on Foata normal form. 2/366 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-18 18:43:21,622 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 17 selfloop transitions, 9 changer transitions 0/269 dead transitions. [2022-11-18 18:43:21,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 269 transitions, 637 flow [2022-11-18 18:43:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2395 transitions. [2022-11-18 18:43:21,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7991324657991324 [2022-11-18 18:43:21,627 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2395 transitions. [2022-11-18 18:43:21,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2395 transitions. [2022-11-18 18:43:21,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:21,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2395 transitions. [2022-11-18 18:43:21,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 266.1111111111111) internal successors, (2395), 9 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:21,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:21,640 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:21,641 INFO L175 Difference]: Start difference. First operand has 277 places, 259 transitions, 563 flow. Second operand 9 states and 2395 transitions. [2022-11-18 18:43:21,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 269 transitions, 637 flow [2022-11-18 18:43:21,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 269 transitions, 635 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:21,647 INFO L231 Difference]: Finished difference. Result has 287 places, 265 transitions, 611 flow [2022-11-18 18:43:21,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=611, PETRI_PLACES=287, PETRI_TRANSITIONS=265} [2022-11-18 18:43:21,648 INFO L288 CegarLoopForPetriNet]: 294 programPoint places, -7 predicate places. [2022-11-18 18:43:21,649 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 265 transitions, 611 flow [2022-11-18 18:43:21,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 265.3) internal successors, (2653), 10 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:21,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:21,650 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:21,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:21,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 18:43:21,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:21,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:21,858 INFO L85 PathProgramCache]: Analyzing trace with hash -743041600, now seen corresponding path program 1 times [2022-11-18 18:43:21,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:21,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093450051] [2022-11-18 18:43:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:21,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:21,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:21,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093450051] [2022-11-18 18:43:21,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093450051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:21,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921033072] [2022-11-18 18:43:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:21,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:21,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:22,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:43:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:43:22,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:22,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:22,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921033072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:22,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:22,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:43:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046569990] [2022-11-18 18:43:22,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:22,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:43:22,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:43:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:22,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-11-18 18:43:22,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 265 transitions, 611 flow. Second operand has 18 states, 18 states have (on average 265.6111111111111) internal successors, (4781), 18 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:22,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:22,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-11-18 18:43:22,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:22,654 INFO L130 PetriNetUnfolder]: 0/316 cut-off events. [2022-11-18 18:43:22,654 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-18 18:43:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 316 events. 0/316 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 671 event pairs, 0 based on Foata normal form. 4/320 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-18 18:43:22,655 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 25 selfloop transitions, 21 changer transitions 0/289 dead transitions. [2022-11-18 18:43:22,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 289 transitions, 811 flow [2022-11-18 18:43:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:43:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:43:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5573 transitions. [2022-11-18 18:43:22,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969397969397969 [2022-11-18 18:43:22,664 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5573 transitions. [2022-11-18 18:43:22,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5573 transitions. [2022-11-18 18:43:22,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:22,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5573 transitions. [2022-11-18 18:43:22,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 265.3809523809524) internal successors, (5573), 21 states have internal predecessors, (5573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:22,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:22,692 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:22,693 INFO L175 Difference]: Start difference. First operand has 287 places, 265 transitions, 611 flow. Second operand 21 states and 5573 transitions. [2022-11-18 18:43:22,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 289 transitions, 811 flow [2022-11-18 18:43:22,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 289 transitions, 797 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:22,700 INFO L231 Difference]: Finished difference. Result has 311 places, 278 transitions, 735 flow [2022-11-18 18:43:22,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=735, PETRI_PLACES=311, PETRI_TRANSITIONS=278} [2022-11-18 18:43:22,701 INFO L288 CegarLoopForPetriNet]: 294 programPoint places, 17 predicate places. [2022-11-18 18:43:22,701 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 278 transitions, 735 flow [2022-11-18 18:43:22,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 265.6111111111111) internal successors, (4781), 18 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:22,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:22,703 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 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] [2022-11-18 18:43:22,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:22,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1699088586, now seen corresponding path program 1 times [2022-11-18 18:43:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:22,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052390551] [2022-11-18 18:43:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:22,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:22,945 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:22,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:22,988 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:22,989 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:22,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:22,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-18 18:43:22,989 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:43:22,991 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:22,991 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-18 18:43:23,030 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-18 18:43:23,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 368 transitions, 856 flow [2022-11-18 18:43:24,813 INFO L130 PetriNetUnfolder]: 1117/5209 cut-off events. [2022-11-18 18:43:24,813 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-18 18:43:24,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6294 conditions, 5209 events. 1117/5209 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 41812 event pairs, 522 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3256. Up to 1024 conditions per place. [2022-11-18 18:43:24,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 324 places, 368 transitions, 856 flow [2022-11-18 18:43:25,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 368 transitions, 856 flow [2022-11-18 18:43:25,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:25,018 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:25,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:25,026 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:25,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:25,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:25,026 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] [2022-11-18 18:43:25,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 589317591, now seen corresponding path program 1 times [2022-11-18 18:43:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857510459] [2022-11-18 18:43:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:25,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857510459] [2022-11-18 18:43:25,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857510459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:25,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:25,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809169512] [2022-11-18 18:43:25,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:25,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 368 [2022-11-18 18:43:25,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 856 flow. Second operand has 2 states, 2 states have (on average 298.5) internal successors, (597), 2 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:25,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:25,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 368 [2022-11-18 18:43:25,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:27,219 INFO L130 PetriNetUnfolder]: 777/4860 cut-off events. [2022-11-18 18:43:27,220 INFO L131 PetriNetUnfolder]: For 3234/3284 co-relation queries the response was YES. [2022-11-18 18:43:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6978 conditions, 4860 events. 777/4860 cut-off events. For 3234/3284 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40539 event pairs, 522 based on Foata normal form. 6564/11150 useless extension candidates. Maximal degree in co-relation 3501. Up to 1033 conditions per place. [2022-11-18 18:43:27,285 INFO L137 encePairwiseOnDemand]: 315/368 looper letters, 8 selfloop transitions, 0 changer transitions 28/314 dead transitions. [2022-11-18 18:43:27,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 314 transitions, 780 flow [2022-11-18 18:43:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 665 transitions. [2022-11-18 18:43:27,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9035326086956522 [2022-11-18 18:43:27,288 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 665 transitions. [2022-11-18 18:43:27,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 665 transitions. [2022-11-18 18:43:27,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:27,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 665 transitions. [2022-11-18 18:43:27,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 332.5) internal successors, (665), 2 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,294 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,295 INFO L175 Difference]: Start difference. First operand has 324 places, 368 transitions, 856 flow. Second operand 2 states and 665 transitions. [2022-11-18 18:43:27,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 314 transitions, 780 flow [2022-11-18 18:43:27,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 314 transitions, 780 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:27,305 INFO L231 Difference]: Finished difference. Result has 324 places, 286 transitions, 668 flow [2022-11-18 18:43:27,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=668, PETRI_PLACES=324, PETRI_TRANSITIONS=286} [2022-11-18 18:43:27,307 INFO L288 CegarLoopForPetriNet]: 324 programPoint places, 0 predicate places. [2022-11-18 18:43:27,307 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 286 transitions, 668 flow [2022-11-18 18:43:27,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 298.5) internal successors, (597), 2 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:27,308 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] [2022-11-18 18:43:27,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-18 18:43:27,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 718400310, now seen corresponding path program 1 times [2022-11-18 18:43:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858907557] [2022-11-18 18:43:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858907557] [2022-11-18 18:43:27,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858907557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:27,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:27,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:27,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498926477] [2022-11-18 18:43:27,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:27,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:27,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:27,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:27,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 368 [2022-11-18 18:43:27,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 286 transitions, 668 flow. Second operand has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:27,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 368 [2022-11-18 18:43:27,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:27,643 INFO L130 PetriNetUnfolder]: 0/437 cut-off events. [2022-11-18 18:43:27,644 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-18 18:43:27,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 437 events. 0/437 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1325 event pairs, 0 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-18 18:43:27,649 INFO L137 encePairwiseOnDemand]: 365/368 looper letters, 17 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-11-18 18:43:27,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 290 transitions, 714 flow [2022-11-18 18:43:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2022-11-18 18:43:27,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8088768115942029 [2022-11-18 18:43:27,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2022-11-18 18:43:27,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2022-11-18 18:43:27,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:27,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2022-11-18 18:43:27,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,658 INFO L175 Difference]: Start difference. First operand has 324 places, 286 transitions, 668 flow. Second operand 3 states and 893 transitions. [2022-11-18 18:43:27,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 290 transitions, 714 flow [2022-11-18 18:43:27,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 290 transitions, 658 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:27,665 INFO L231 Difference]: Finished difference. Result has 307 places, 287 transitions, 624 flow [2022-11-18 18:43:27,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=307, PETRI_TRANSITIONS=287} [2022-11-18 18:43:27,667 INFO L288 CegarLoopForPetriNet]: 324 programPoint places, -17 predicate places. [2022-11-18 18:43:27,667 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 287 transitions, 624 flow [2022-11-18 18:43:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:27,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:27,668 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] [2022-11-18 18:43:27,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 18:43:27,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1468210244, now seen corresponding path program 1 times [2022-11-18 18:43:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:27,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294853871] [2022-11-18 18:43:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:27,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294853871] [2022-11-18 18:43:27,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294853871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437856329] [2022-11-18 18:43:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:27,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:27,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:27,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:43:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:27,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:28,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437856329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:28,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:28,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:28,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175602927] [2022-11-18 18:43:28,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:28,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:28,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:28,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-11-18 18:43:28,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 287 transitions, 624 flow. Second operand has 10 states, 10 states have (on average 292.3) internal successors, (2923), 10 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:28,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:28,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-11-18 18:43:28,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:28,241 INFO L130 PetriNetUnfolder]: 0/413 cut-off events. [2022-11-18 18:43:28,242 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 18:43:28,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 413 events. 0/413 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1177 event pairs, 0 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-18 18:43:28,244 INFO L137 encePairwiseOnDemand]: 362/368 looper letters, 18 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-11-18 18:43:28,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 297 transitions, 700 flow [2022-11-18 18:43:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2639 transitions. [2022-11-18 18:43:28,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7967995169082126 [2022-11-18 18:43:28,249 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2639 transitions. [2022-11-18 18:43:28,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2639 transitions. [2022-11-18 18:43:28,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:28,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2639 transitions. [2022-11-18 18:43:28,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.22222222222223) internal successors, (2639), 9 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:28,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 368.0) internal successors, (3680), 10 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:28,262 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 368.0) internal successors, (3680), 10 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:28,263 INFO L175 Difference]: Start difference. First operand has 307 places, 287 transitions, 624 flow. Second operand 9 states and 2639 transitions. [2022-11-18 18:43:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 297 transitions, 700 flow [2022-11-18 18:43:28,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 297 transitions, 698 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:28,270 INFO L231 Difference]: Finished difference. Result has 317 places, 293 transitions, 672 flow [2022-11-18 18:43:28,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=672, PETRI_PLACES=317, PETRI_TRANSITIONS=293} [2022-11-18 18:43:28,271 INFO L288 CegarLoopForPetriNet]: 324 programPoint places, -7 predicate places. [2022-11-18 18:43:28,271 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 293 transitions, 672 flow [2022-11-18 18:43:28,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 292.3) internal successors, (2923), 10 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:28,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:28,273 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:28,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:28,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 18:43:28,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1630387581, now seen corresponding path program 1 times [2022-11-18 18:43:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:28,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90998111] [2022-11-18 18:43:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:28,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:28,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90998111] [2022-11-18 18:43:28,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90998111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652324194] [2022-11-18 18:43:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:28,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:28,636 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:28,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:43:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:28,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:43:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:28,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:29,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652324194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:29,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:29,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:43:29,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646961272] [2022-11-18 18:43:29,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:29,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:43:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:43:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:29,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-11-18 18:43:29,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 293 transitions, 672 flow. Second operand has 18 states, 18 states have (on average 292.6111111111111) internal successors, (5267), 18 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:29,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:29,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-11-18 18:43:29,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:29,586 INFO L130 PetriNetUnfolder]: 0/365 cut-off events. [2022-11-18 18:43:29,587 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-18 18:43:29,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 365 events. 0/365 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 856 event pairs, 0 based on Foata normal form. 4/369 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-18 18:43:29,588 INFO L137 encePairwiseOnDemand]: 362/368 looper letters, 26 selfloop transitions, 21 changer transitions 0/317 dead transitions. [2022-11-18 18:43:29,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 317 transitions, 874 flow [2022-11-18 18:43:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:43:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:43:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6141 transitions. [2022-11-18 18:43:29,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-11-18 18:43:29,598 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6141 transitions. [2022-11-18 18:43:29,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6141 transitions. [2022-11-18 18:43:29,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:29,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6141 transitions. [2022-11-18 18:43:29,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 292.42857142857144) internal successors, (6141), 21 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:29,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 368.0) internal successors, (8096), 22 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:29,623 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 368.0) internal successors, (8096), 22 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:29,623 INFO L175 Difference]: Start difference. First operand has 317 places, 293 transitions, 672 flow. Second operand 21 states and 6141 transitions. [2022-11-18 18:43:29,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 317 transitions, 874 flow [2022-11-18 18:43:29,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 317 transitions, 860 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:29,631 INFO L231 Difference]: Finished difference. Result has 341 places, 306 transitions, 796 flow [2022-11-18 18:43:29,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=796, PETRI_PLACES=341, PETRI_TRANSITIONS=306} [2022-11-18 18:43:29,632 INFO L288 CegarLoopForPetriNet]: 324 programPoint places, 17 predicate places. [2022-11-18 18:43:29,632 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 306 transitions, 796 flow [2022-11-18 18:43:29,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 292.6111111111111) internal successors, (5267), 18 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:29,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:29,634 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:29,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:29,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:29,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1603149981, now seen corresponding path program 1 times [2022-11-18 18:43:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705049330] [2022-11-18 18:43:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705049330] [2022-11-18 18:43:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705049330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475483893] [2022-11-18 18:43:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:30,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:30,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:30,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:43:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:30,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:43:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:30,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475483893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:31,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:31,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:43:31,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223991525] [2022-11-18 18:43:31,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:43:31,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:43:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:43:31,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-11-18 18:43:31,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 306 transitions, 796 flow. Second operand has 34 states, 34 states have (on average 292.79411764705884) internal successors, (9955), 34 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:31,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:31,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-11-18 18:43:31,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:31,585 INFO L130 PetriNetUnfolder]: 0/341 cut-off events. [2022-11-18 18:43:31,586 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-18 18:43:31,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 341 events. 0/341 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 717 event pairs, 0 based on Foata normal form. 2/343 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-18 18:43:31,587 INFO L137 encePairwiseOnDemand]: 363/368 looper letters, 27 selfloop transitions, 25 changer transitions 0/311 dead transitions. [2022-11-18 18:43:31,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 311 transitions, 942 flow [2022-11-18 18:43:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:43:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 18:43:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7884 transitions. [2022-11-18 18:43:31,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7934782608695652 [2022-11-18 18:43:31,606 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7884 transitions. [2022-11-18 18:43:31,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7884 transitions. [2022-11-18 18:43:31,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:31,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7884 transitions. [2022-11-18 18:43:31,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 292.0) internal successors, (7884), 27 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:31,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 368.0) internal successors, (10304), 28 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:31,649 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 368.0) internal successors, (10304), 28 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:31,650 INFO L175 Difference]: Start difference. First operand has 341 places, 306 transitions, 796 flow. Second operand 27 states and 7884 transitions. [2022-11-18 18:43:31,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 311 transitions, 942 flow [2022-11-18 18:43:31,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 311 transitions, 888 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-18 18:43:31,661 INFO L231 Difference]: Finished difference. Result has 342 places, 297 transitions, 781 flow [2022-11-18 18:43:31,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=781, PETRI_PLACES=342, PETRI_TRANSITIONS=297} [2022-11-18 18:43:31,664 INFO L288 CegarLoopForPetriNet]: 324 programPoint places, 18 predicate places. [2022-11-18 18:43:31,664 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 297 transitions, 781 flow [2022-11-18 18:43:31,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 292.79411764705884) internal successors, (9955), 34 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:31,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:31,668 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:31,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:31,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:31,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash -514315141, now seen corresponding path program 1 times [2022-11-18 18:43:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320926328] [2022-11-18 18:43:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:31,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:32,001 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:32,002 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:32,003 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:32,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-18 18:43:32,004 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:43:32,007 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:32,007 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-18 18:43:32,078 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-18 18:43:32,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 403 transitions, 950 flow [2022-11-18 18:43:35,973 INFO L130 PetriNetUnfolder]: 2408/10140 cut-off events. [2022-11-18 18:43:35,974 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-18 18:43:36,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12517 conditions, 10140 events. 2408/10140 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 94197 event pairs, 1291 based on Foata normal form. 0/9002 useless extension candidates. Maximal degree in co-relation 6276. Up to 2304 conditions per place. [2022-11-18 18:43:36,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 403 transitions, 950 flow [2022-11-18 18:43:36,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 403 transitions, 950 flow [2022-11-18 18:43:36,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:36,438 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:36,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:36,446 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:36,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:36,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:36,447 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] [2022-11-18 18:43:36,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1511527529, now seen corresponding path program 1 times [2022-11-18 18:43:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187741193] [2022-11-18 18:43:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:36,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187741193] [2022-11-18 18:43:36,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187741193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:36,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:36,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:36,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134522817] [2022-11-18 18:43:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:36,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:36,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:36,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 403 [2022-11-18 18:43:36,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 403 transitions, 950 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:36,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:36,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 403 [2022-11-18 18:43:36,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:40,574 INFO L130 PetriNetUnfolder]: 1802/9524 cut-off events. [2022-11-18 18:43:40,574 INFO L131 PetriNetUnfolder]: For 7131/7193 co-relation queries the response was YES. [2022-11-18 18:43:40,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14215 conditions, 9524 events. 1802/9524 cut-off events. For 7131/7193 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91863 event pairs, 1291 based on Foata normal form. 14546/23538 useless extension candidates. Maximal degree in co-relation 6959. Up to 2314 conditions per place. [2022-11-18 18:43:40,777 INFO L137 encePairwiseOnDemand]: 344/403 looper letters, 9 selfloop transitions, 0 changer transitions 29/343 dead transitions. [2022-11-18 18:43:40,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 343 transitions, 866 flow [2022-11-18 18:43:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:43:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:43:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 727 transitions. [2022-11-18 18:43:40,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.901985111662531 [2022-11-18 18:43:40,781 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 727 transitions. [2022-11-18 18:43:40,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 727 transitions. [2022-11-18 18:43:40,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:40,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 727 transitions. [2022-11-18 18:43:40,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 363.5) internal successors, (727), 2 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:40,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:40,786 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:40,786 INFO L175 Difference]: Start difference. First operand has 354 places, 403 transitions, 950 flow. Second operand 2 states and 727 transitions. [2022-11-18 18:43:40,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 343 transitions, 866 flow [2022-11-18 18:43:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 343 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:40,799 INFO L231 Difference]: Finished difference. Result has 354 places, 314 transitions, 745 flow [2022-11-18 18:43:40,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=745, PETRI_PLACES=354, PETRI_TRANSITIONS=314} [2022-11-18 18:43:40,800 INFO L288 CegarLoopForPetriNet]: 354 programPoint places, 0 predicate places. [2022-11-18 18:43:40,801 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 314 transitions, 745 flow [2022-11-18 18:43:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:40,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:40,801 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] [2022-11-18 18:43:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-18 18:43:40,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1382444810, now seen corresponding path program 1 times [2022-11-18 18:43:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141422691] [2022-11-18 18:43:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:40,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141422691] [2022-11-18 18:43:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141422691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:40,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:40,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:43:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485430830] [2022-11-18 18:43:40,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:43:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:43:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:43:40,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 403 [2022-11-18 18:43:40,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 314 transitions, 745 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:40,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:40,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 403 [2022-11-18 18:43:40,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:41,059 INFO L130 PetriNetUnfolder]: 0/486 cut-off events. [2022-11-18 18:43:41,059 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-18 18:43:41,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 486 events. 0/486 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1512 event pairs, 0 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-18 18:43:41,061 INFO L137 encePairwiseOnDemand]: 400/403 looper letters, 18 selfloop transitions, 2 changer transitions 0/318 dead transitions. [2022-11-18 18:43:41,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 318 transitions, 793 flow [2022-11-18 18:43:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:43:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:43:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-11-18 18:43:41,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-11-18 18:43:41,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-11-18 18:43:41,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-11-18 18:43:41,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:41,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-11-18 18:43:41,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,071 INFO L175 Difference]: Start difference. First operand has 354 places, 314 transitions, 745 flow. Second operand 3 states and 975 transitions. [2022-11-18 18:43:41,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 318 transitions, 793 flow [2022-11-18 18:43:41,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 318 transitions, 721 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-18 18:43:41,079 INFO L231 Difference]: Finished difference. Result has 337 places, 315 transitions, 685 flow [2022-11-18 18:43:41,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=685, PETRI_PLACES=337, PETRI_TRANSITIONS=315} [2022-11-18 18:43:41,081 INFO L288 CegarLoopForPetriNet]: 354 programPoint places, -17 predicate places. [2022-11-18 18:43:41,081 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 315 transitions, 685 flow [2022-11-18 18:43:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:41,082 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] [2022-11-18 18:43:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-18 18:43:41,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1123206115, now seen corresponding path program 1 times [2022-11-18 18:43:41,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:41,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681081425] [2022-11-18 18:43:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:41,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681081425] [2022-11-18 18:43:41,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681081425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:41,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116619758] [2022-11-18 18:43:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:41,159 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:41,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:43:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:43:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:41,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:41,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116619758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:41,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:41,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:43:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738752661] [2022-11-18 18:43:41,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:41,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:43:41,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:43:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:43:41,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-11-18 18:43:41,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 315 transitions, 685 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:41,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-11-18 18:43:41,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:41,903 INFO L130 PetriNetUnfolder]: 0/462 cut-off events. [2022-11-18 18:43:41,903 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-18 18:43:41,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 462 events. 0/462 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1366 event pairs, 0 based on Foata normal form. 2/464 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-18 18:43:41,905 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 19 selfloop transitions, 9 changer transitions 0/325 dead transitions. [2022-11-18 18:43:41,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 325 transitions, 763 flow [2022-11-18 18:43:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:43:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:43:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2883 transitions. [2022-11-18 18:43:41,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-11-18 18:43:41,917 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2883 transitions. [2022-11-18 18:43:41,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2883 transitions. [2022-11-18 18:43:41,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:41,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2883 transitions. [2022-11-18 18:43:41,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.3333333333333) internal successors, (2883), 9 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,935 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,935 INFO L175 Difference]: Start difference. First operand has 337 places, 315 transitions, 685 flow. Second operand 9 states and 2883 transitions. [2022-11-18 18:43:41,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 325 transitions, 763 flow [2022-11-18 18:43:41,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 325 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:41,948 INFO L231 Difference]: Finished difference. Result has 347 places, 321 transitions, 733 flow [2022-11-18 18:43:41,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=733, PETRI_PLACES=347, PETRI_TRANSITIONS=321} [2022-11-18 18:43:41,949 INFO L288 CegarLoopForPetriNet]: 354 programPoint places, -7 predicate places. [2022-11-18 18:43:41,950 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 321 transitions, 733 flow [2022-11-18 18:43:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:41,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:41,951 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:41,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 18:43:42,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1307887462, now seen corresponding path program 1 times [2022-11-18 18:43:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:42,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568297955] [2022-11-18 18:43:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:42,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:42,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568297955] [2022-11-18 18:43:42,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568297955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:42,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308995814] [2022-11-18 18:43:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:42,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:42,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:43:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:43:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:42,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:42,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308995814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:42,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:42,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:43:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282690339] [2022-11-18 18:43:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:42,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:43:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:43:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:43:42,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-11-18 18:43:42,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 321 transitions, 733 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:42,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:42,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-11-18 18:43:42,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:43,276 INFO L130 PetriNetUnfolder]: 0/414 cut-off events. [2022-11-18 18:43:43,276 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 18:43:43,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 414 events. 0/414 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1040 event pairs, 0 based on Foata normal form. 4/418 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:43:43,277 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 27 selfloop transitions, 21 changer transitions 0/345 dead transitions. [2022-11-18 18:43:43,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 345 transitions, 937 flow [2022-11-18 18:43:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:43:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:43:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6709 transitions. [2022-11-18 18:43:43,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7927448895190831 [2022-11-18 18:43:43,287 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6709 transitions. [2022-11-18 18:43:43,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6709 transitions. [2022-11-18 18:43:43,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:43,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6709 transitions. [2022-11-18 18:43:43,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.4761904761905) internal successors, (6709), 21 states have internal predecessors, (6709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:43,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:43,316 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:43,316 INFO L175 Difference]: Start difference. First operand has 347 places, 321 transitions, 733 flow. Second operand 21 states and 6709 transitions. [2022-11-18 18:43:43,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 345 transitions, 937 flow [2022-11-18 18:43:43,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 345 transitions, 923 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:43:43,326 INFO L231 Difference]: Finished difference. Result has 371 places, 334 transitions, 857 flow [2022-11-18 18:43:43,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=857, PETRI_PLACES=371, PETRI_TRANSITIONS=334} [2022-11-18 18:43:43,327 INFO L288 CegarLoopForPetriNet]: 354 programPoint places, 17 predicate places. [2022-11-18 18:43:43,327 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 334 transitions, 857 flow [2022-11-18 18:43:43,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:43,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:43,329 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:43:43,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:43,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:43,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1835892612, now seen corresponding path program 1 times [2022-11-18 18:43:43,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:43,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697179452] [2022-11-18 18:43:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:44,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:44,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697179452] [2022-11-18 18:43:44,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697179452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:44,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645730786] [2022-11-18 18:43:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:44,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:44,031 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:44,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:43:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:43:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:44,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:44,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645730786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:44,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:44,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:43:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542675154] [2022-11-18 18:43:44,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:43:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:43:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:43:44,990 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-11-18 18:43:44,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 334 transitions, 857 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:44,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:44,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-11-18 18:43:44,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:45,560 INFO L130 PetriNetUnfolder]: 0/378 cut-off events. [2022-11-18 18:43:45,561 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-18 18:43:45,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 378 events. 0/378 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 821 event pairs, 0 based on Foata normal form. 3/381 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:43:45,562 INFO L137 encePairwiseOnDemand]: 398/403 looper letters, 30 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2022-11-18 18:43:45,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 344 transitions, 1049 flow [2022-11-18 18:43:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:43:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 18:43:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9571 transitions. [2022-11-18 18:43:45,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791645988420182 [2022-11-18 18:43:45,576 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9571 transitions. [2022-11-18 18:43:45,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9571 transitions. [2022-11-18 18:43:45,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:45,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9571 transitions. [2022-11-18 18:43:45,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 319.03333333333336) internal successors, (9571), 30 states have internal predecessors, (9571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:45,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 403.0) internal successors, (12493), 31 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:45,609 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 403.0) internal successors, (12493), 31 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:45,609 INFO L175 Difference]: Start difference. First operand has 371 places, 334 transitions, 857 flow. Second operand 30 states and 9571 transitions. [2022-11-18 18:43:45,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 344 transitions, 1049 flow [2022-11-18 18:43:45,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 344 transitions, 989 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-18 18:43:45,619 INFO L231 Difference]: Finished difference. Result has 375 places, 328 transitions, 866 flow [2022-11-18 18:43:45,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=866, PETRI_PLACES=375, PETRI_TRANSITIONS=328} [2022-11-18 18:43:45,620 INFO L288 CegarLoopForPetriNet]: 354 programPoint places, 21 predicate places. [2022-11-18 18:43:45,621 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 328 transitions, 866 flow [2022-11-18 18:43:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:45,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:45,624 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:45,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:45,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:45,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -324632142, now seen corresponding path program 1 times [2022-11-18 18:43:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:45,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500904574] [2022-11-18 18:43:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:45,867 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:43:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:43:45,970 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:43:45,970 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:43:45,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:43:45,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:43:45,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-18 18:43:45,971 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:43:45,972 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:43:45,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-18 18:43:46,037 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-18 18:43:46,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 438 transitions, 1046 flow [2022-11-18 18:43:53,130 INFO L130 PetriNetUnfolder]: 5235/20191 cut-off events. [2022-11-18 18:43:53,130 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-18 18:43:53,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25397 conditions, 20191 events. 5235/20191 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 211680 event pairs, 3084 based on Foata normal form. 0/18017 useless extension candidates. Maximal degree in co-relation 12497. Up to 5120 conditions per place. [2022-11-18 18:43:53,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 438 transitions, 1046 flow [2022-11-18 18:43:54,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 438 transitions, 1046 flow [2022-11-18 18:43:54,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:43:54,507 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;@1b68127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:43:54,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:43:54,518 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-18 18:43:54,520 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:43:54,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:54,521 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] [2022-11-18 18:43:54,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1299450647, now seen corresponding path program 1 times [2022-11-18 18:43:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:54,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110735419] [2022-11-18 18:43:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110735419] [2022-11-18 18:43:54,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110735419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:43:54,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:43:54,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:43:54,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385796513] [2022-11-18 18:43:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:43:54,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:43:54,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:43:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:43:54,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 438 [2022-11-18 18:43:54,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 438 transitions, 1046 flow. Second operand has 2 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:54,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:54,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 438 [2022-11-18 18:43:54,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:02,177 INFO L130 PetriNetUnfolder]: 4107/19052 cut-off events. [2022-11-18 18:44:02,177 INFO L131 PetriNetUnfolder]: For 15632/15678 co-relation queries the response was YES. [2022-11-18 18:44:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29389 conditions, 19052 events. 4107/19052 cut-off events. For 15632/15678 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206865 event pairs, 3084 based on Foata normal form. 32006/50012 useless extension candidates. Maximal degree in co-relation 14194. Up to 5131 conditions per place. [2022-11-18 18:44:02,675 INFO L137 encePairwiseOnDemand]: 373/438 looper letters, 10 selfloop transitions, 0 changer transitions 30/372 dead transitions. [2022-11-18 18:44:02,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 372 transitions, 954 flow [2022-11-18 18:44:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:44:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:44:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-11-18 18:44:02,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9006849315068494 [2022-11-18 18:44:02,677 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-11-18 18:44:02,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-11-18 18:44:02,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:02,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-11-18 18:44:02,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,680 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,680 INFO L175 Difference]: Start difference. First operand has 384 places, 438 transitions, 1046 flow. Second operand 2 states and 789 transitions. [2022-11-18 18:44:02,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 372 transitions, 954 flow [2022-11-18 18:44:02,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 372 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:44:02,692 INFO L231 Difference]: Finished difference. Result has 384 places, 342 transitions, 824 flow [2022-11-18 18:44:02,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=824, PETRI_PLACES=384, PETRI_TRANSITIONS=342} [2022-11-18 18:44:02,693 INFO L288 CegarLoopForPetriNet]: 384 programPoint places, 0 predicate places. [2022-11-18 18:44:02,694 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 342 transitions, 824 flow [2022-11-18 18:44:02,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:02,694 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] [2022-11-18 18:44:02,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-18 18:44:02,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1428533366, now seen corresponding path program 1 times [2022-11-18 18:44:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:02,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623061712] [2022-11-18 18:44:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:02,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623061712] [2022-11-18 18:44:02,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623061712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:02,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:02,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:44:02,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617157200] [2022-11-18 18:44:02,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:02,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:44:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:44:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:44:02,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 438 [2022-11-18 18:44:02,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 342 transitions, 824 flow. Second operand has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:02,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 438 [2022-11-18 18:44:02,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:02,931 INFO L130 PetriNetUnfolder]: 0/535 cut-off events. [2022-11-18 18:44:02,931 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-18 18:44:02,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 535 events. 0/535 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1691 event pairs, 0 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-18 18:44:02,933 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 19 selfloop transitions, 2 changer transitions 0/346 dead transitions. [2022-11-18 18:44:02,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 346 transitions, 874 flow [2022-11-18 18:44:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:44:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:44:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2022-11-18 18:44:02,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.80441400304414 [2022-11-18 18:44:02,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2022-11-18 18:44:02,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2022-11-18 18:44:02,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:02,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2022-11-18 18:44:02,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,939 INFO L175 Difference]: Start difference. First operand has 384 places, 342 transitions, 824 flow. Second operand 3 states and 1057 transitions. [2022-11-18 18:44:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 346 transitions, 874 flow [2022-11-18 18:44:02,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 346 transitions, 784 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-18 18:44:02,946 INFO L231 Difference]: Finished difference. Result has 367 places, 343 transitions, 746 flow [2022-11-18 18:44:02,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=746, PETRI_PLACES=367, PETRI_TRANSITIONS=343} [2022-11-18 18:44:02,947 INFO L288 CegarLoopForPetriNet]: 384 programPoint places, -17 predicate places. [2022-11-18 18:44:02,947 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 343 transitions, 746 flow [2022-11-18 18:44:02,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:02,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:02,948 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] [2022-11-18 18:44:02,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-18 18:44:02,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1250548514, now seen corresponding path program 1 times [2022-11-18 18:44:02,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:02,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849791131] [2022-11-18 18:44:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:02,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849791131] [2022-11-18 18:44:02,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849791131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865149273] [2022-11-18 18:44:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:02,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:03,017 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:03,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:44:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:44:03,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:03,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865149273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:03,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:03,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:44:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931967519] [2022-11-18 18:44:03,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:03,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:44:03,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:44:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:44:03,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-11-18 18:44:03,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 343 transitions, 746 flow. Second operand has 10 states, 10 states have (on average 346.3) internal successors, (3463), 10 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:03,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:03,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-11-18 18:44:03,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:03,530 INFO L130 PetriNetUnfolder]: 0/511 cut-off events. [2022-11-18 18:44:03,530 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-18 18:44:03,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 511 events. 0/511 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1545 event pairs, 0 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-18 18:44:03,531 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 20 selfloop transitions, 9 changer transitions 0/353 dead transitions. [2022-11-18 18:44:03,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 353 transitions, 826 flow [2022-11-18 18:44:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:44:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3127 transitions. [2022-11-18 18:44:03,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7932521562658549 [2022-11-18 18:44:03,537 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3127 transitions. [2022-11-18 18:44:03,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3127 transitions. [2022-11-18 18:44:03,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:03,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3127 transitions. [2022-11-18 18:44:03,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 347.44444444444446) internal successors, (3127), 9 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:03,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:03,543 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:03,543 INFO L175 Difference]: Start difference. First operand has 367 places, 343 transitions, 746 flow. Second operand 9 states and 3127 transitions. [2022-11-18 18:44:03,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 353 transitions, 826 flow [2022-11-18 18:44:03,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 353 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:44:03,549 INFO L231 Difference]: Finished difference. Result has 377 places, 349 transitions, 794 flow [2022-11-18 18:44:03,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=794, PETRI_PLACES=377, PETRI_TRANSITIONS=349} [2022-11-18 18:44:03,550 INFO L288 CegarLoopForPetriNet]: 384 programPoint places, -7 predicate places. [2022-11-18 18:44:03,551 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 349 transitions, 794 flow [2022-11-18 18:44:03,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 346.3) internal successors, (3463), 10 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:03,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:03,552 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:44:03,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:03,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -967932137, now seen corresponding path program 1 times [2022-11-18 18:44:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:03,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530410490] [2022-11-18 18:44:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:03,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530410490] [2022-11-18 18:44:03,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530410490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602284623] [2022-11-18 18:44:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:03,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:03,877 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:03,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:44:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:04,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:44:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:04,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:04,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602284623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:04,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:04,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:44:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855425326] [2022-11-18 18:44:04,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:04,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:44:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:44:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:44:04,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-11-18 18:44:04,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 349 transitions, 794 flow. Second operand has 18 states, 18 states have (on average 346.6111111111111) internal successors, (6239), 18 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:04,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:04,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-11-18 18:44:04,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:04,798 INFO L130 PetriNetUnfolder]: 0/463 cut-off events. [2022-11-18 18:44:04,798 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-18 18:44:04,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 463 events. 0/463 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1226 event pairs, 0 based on Foata normal form. 4/467 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-18 18:44:04,799 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 28 selfloop transitions, 21 changer transitions 0/373 dead transitions. [2022-11-18 18:44:04,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 373 transitions, 1000 flow [2022-11-18 18:44:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:44:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:44:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7277 transitions. [2022-11-18 18:44:04,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911502500543597 [2022-11-18 18:44:04,807 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7277 transitions. [2022-11-18 18:44:04,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7277 transitions. [2022-11-18 18:44:04,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:04,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7277 transitions. [2022-11-18 18:44:04,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 346.5238095238095) internal successors, (7277), 21 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:04,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:04,826 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:04,827 INFO L175 Difference]: Start difference. First operand has 377 places, 349 transitions, 794 flow. Second operand 21 states and 7277 transitions. [2022-11-18 18:44:04,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 373 transitions, 1000 flow [2022-11-18 18:44:04,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 373 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:44:04,835 INFO L231 Difference]: Finished difference. Result has 401 places, 362 transitions, 918 flow [2022-11-18 18:44:04,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=918, PETRI_PLACES=401, PETRI_TRANSITIONS=362} [2022-11-18 18:44:04,836 INFO L288 CegarLoopForPetriNet]: 384 programPoint places, 17 predicate places. [2022-11-18 18:44:04,836 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 362 transitions, 918 flow [2022-11-18 18:44:04,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 346.6111111111111) internal successors, (6239), 18 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:04,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:04,838 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:44:04,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-18 18:44:05,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -134243211, now seen corresponding path program 1 times [2022-11-18 18:44:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605051591] [2022-11-18 18:44:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605051591] [2022-11-18 18:44:05,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605051591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253602274] [2022-11-18 18:44:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:05,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:05,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:05,343 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:05,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:44:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:44:05,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:05,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:06,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253602274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:06,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:06,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:44:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820739709] [2022-11-18 18:44:06,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:06,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:44:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:44:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:44:06,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-11-18 18:44:06,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 362 transitions, 918 flow. Second operand has 34 states, 34 states have (on average 346.79411764705884) internal successors, (11791), 34 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:06,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-11-18 18:44:06,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:06,661 INFO L130 PetriNetUnfolder]: 0/415 cut-off events. [2022-11-18 18:44:06,661 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-18 18:44:06,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 415 events. 0/415 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 925 event pairs, 0 based on Foata normal form. 4/419 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-18 18:44:06,662 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 33 selfloop transitions, 31 changer transitions 0/377 dead transitions. [2022-11-18 18:44:06,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 377 transitions, 1156 flow [2022-11-18 18:44:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:44:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 18:44:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 11420 transitions. [2022-11-18 18:44:06,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7900927079009271 [2022-11-18 18:44:06,674 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 11420 transitions. [2022-11-18 18:44:06,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 11420 transitions. [2022-11-18 18:44:06,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:06,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 11420 transitions. [2022-11-18 18:44:06,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 346.06060606060606) internal successors, (11420), 33 states have internal predecessors, (11420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,704 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,704 INFO L175 Difference]: Start difference. First operand has 401 places, 362 transitions, 918 flow. Second operand 33 states and 11420 transitions. [2022-11-18 18:44:06,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 377 transitions, 1156 flow [2022-11-18 18:44:06,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 377 transitions, 1090 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-18 18:44:06,713 INFO L231 Difference]: Finished difference. Result has 408 places, 359 transitions, 951 flow [2022-11-18 18:44:06,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=951, PETRI_PLACES=408, PETRI_TRANSITIONS=359} [2022-11-18 18:44:06,714 INFO L288 CegarLoopForPetriNet]: 384 programPoint places, 24 predicate places. [2022-11-18 18:44:06,715 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 951 flow [2022-11-18 18:44:06,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 346.79411764705884) internal successors, (11791), 34 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:06,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:06,717 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:06,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:06,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe5be1-4ebe-4540-a354-088cc0765da1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-18 18:44:06,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 540087759, now seen corresponding path program 1 times [2022-11-18 18:44:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532378015] [2022-11-18 18:44:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:44:06,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:44:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:44:06,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:44:06,996 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:44:06,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:44:06,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:44:06,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-18 18:44:06,997 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:44:06,997 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:44:06,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-18 18:44:07,048 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-11-18 18:44:07,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 473 transitions, 1144 flow [2022-11-18 18:44:24,008 INFO L130 PetriNetUnfolder]: 11390/40738 cut-off events. [2022-11-18 18:44:24,008 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-11-18 18:44:26,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52102 conditions, 40738 events. 11390/40738 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 479099 event pairs, 7181 based on Foata normal form. 0/36504 useless extension candidates. Maximal degree in co-relation 25375. Up to 11264 conditions per place. [2022-11-18 18:44:26,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 473 transitions, 1144 flow