./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc --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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- 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-5e519f3 [2022-11-02 20:40:37,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:40:37,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:40:37,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:40:37,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:40:37,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:40:37,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:40:37,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:40:37,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:40:37,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:40:37,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:40:37,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:40:37,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:40:37,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:40:37,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:40:37,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:40:37,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:40:37,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:40:37,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:40:37,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:40:37,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:40:37,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:40:37,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:40:37,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:40:37,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:40:37,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:40:37,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:40:37,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:40:37,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:40:37,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:40:37,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:40:37,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:40:37,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:40:37,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:40:37,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:40:37,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:40:37,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:40:37,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:40:37,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:40:37,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:40:37,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:40:37,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:40:37,231 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:40:37,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:40:37,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:40:37,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:40:37,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:40:37,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:40:37,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:40:37,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:40:37,235 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:40:37,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:40:37,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:40:37,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:40:37,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:40:37,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:40:37,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:40:37,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:40:37,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:40:37,238 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:40:37,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:40:37,238 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:40:37,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:40:37,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:40:37,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:40:37,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:40:37,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:37,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:40:37,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:40:37,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:40:37,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:40:37,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:40:37,241 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:40:37,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:40:37,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:40:37,242 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_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2022-11-02 20:40:37,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:40:37,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:40:37,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:40:37,611 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:40:37,612 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:40:37,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2022-11-02 20:40:37,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/data/257ad28a9/7b5526dae62f4904afe340149752becb/FLAG050328e34 [2022-11-02 20:40:38,271 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:40:38,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2022-11-02 20:40:38,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/data/257ad28a9/7b5526dae62f4904afe340149752becb/FLAG050328e34 [2022-11-02 20:40:38,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/data/257ad28a9/7b5526dae62f4904afe340149752becb [2022-11-02 20:40:38,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:40:38,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:40:38,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:38,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:40:38,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:40:38,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17da135b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38, skipping insertion in model container [2022-11-02 20:40:38,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:40:38,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:40:38,849 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:40:38,996 WARN L230 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_ab236b70-c584-481b-b6ee-6d568e002cf7/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2022-11-02 20:40:39,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:40:39,025 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:40:39,052 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:40:39,093 WARN L230 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_ab236b70-c584-481b-b6ee-6d568e002cf7/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2022-11-02 20:40:39,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:40:39,152 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:40:39,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39 WrapperNode [2022-11-02 20:40:39,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:39,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:40:39,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:40:39,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:40:39,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,198 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-11-02 20:40:39,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:40:39,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:40:39,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:40:39,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:40:39,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:40:39,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:40:39,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:40:39,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:40:39,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (1/1) ... [2022-11-02 20:40:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:39,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:40:39,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab236b70-c584-481b-b6ee-6d568e002cf7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:40:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-02 20:40:39,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-02 20:40:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:40:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:40:39,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:40:39,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:40:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:40:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:40:39,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:40:39,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:40:39,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:40:39,324 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:40:39,469 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:40:39,479 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:40:39,664 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:40:39,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:40:39,702 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:40:39,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:40:39 BoogieIcfgContainer [2022-11-02 20:40:39,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:40:39,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:40:39,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:40:39,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:40:39,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:40:38" (1/3) ... [2022-11-02 20:40:39,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f903c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:40:39, skipping insertion in model container [2022-11-02 20:40:39,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:39" (2/3) ... [2022-11-02 20:40:39,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f903c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:40:39, skipping insertion in model container [2022-11-02 20:40:39,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:40:39" (3/3) ... [2022-11-02 20:40:39,732 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2022-11-02 20:40:39,749 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:40:39,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:40:39,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:40:39,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:40:39,823 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:39,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 79 flow [2022-11-02 20:40:39,918 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-11-02 20:40:39,919 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:39,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-11-02 20:40:39,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 79 flow [2022-11-02 20:40:39,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 79 flow [2022-11-02 20:40:39,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:39,957 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:39,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:40:40,000 INFO L130 PetriNetUnfolder]: 2/31 cut-off events. [2022-11-02 20:40:40,002 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:40,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:40,005 INFO L208 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] [2022-11-02 20:40:40,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1096869042, now seen corresponding path program 1 times [2022-11-02 20:40:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:40,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367591324] [2022-11-02 20:40:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:40,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367591324] [2022-11-02 20:40:40,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367591324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:40,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:40,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:40,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853946114] [2022-11-02 20:40:40,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:40,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:40,663 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 37 [2022-11-02 20:40:40,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:40,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 37 [2022-11-02 20:40:40,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:40,770 INFO L130 PetriNetUnfolder]: 0/33 cut-off events. [2022-11-02 20:40:40,770 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:40:40,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 33 events. 0/33 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 3/36 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-02 20:40:40,772 INFO L137 encePairwiseOnDemand]: 32/37 looper letters, 2 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-11-02 20:40:40,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 71 flow [2022-11-02 20:40:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2022-11-02 20:40:40,795 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8918918918918919 [2022-11-02 20:40:40,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2022-11-02 20:40:40,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2022-11-02 20:40:40,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:40,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2022-11-02 20:40:40,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,823 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 79 flow. Second operand 3 states and 99 transitions. [2022-11-02 20:40:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 71 flow [2022-11-02 20:40:40,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 71 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:40,836 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 67 flow [2022-11-02 20:40:40,838 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2022-11-02 20:40:40,843 INFO L287 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-11-02 20:40:40,844 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 67 flow [2022-11-02 20:40:40,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:40,845 INFO L208 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] [2022-11-02 20:40:40,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:40:40,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 750747050, now seen corresponding path program 1 times [2022-11-02 20:40:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23181379] [2022-11-02 20:40:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:40,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:40,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:40,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:40,953 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:40,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-02 20:40:40,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-02 20:40:40,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-02 20:40:40,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:40:40,959 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:40:40,963 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:40,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:40:40,989 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:40,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 45 transitions, 102 flow [2022-11-02 20:40:41,014 INFO L130 PetriNetUnfolder]: 3/69 cut-off events. [2022-11-02 20:40:41,014 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:40:41,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 3/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2022-11-02 20:40:41,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 45 transitions, 102 flow [2022-11-02 20:40:41,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 102 flow [2022-11-02 20:40:41,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:41,020 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:41,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:40:41,031 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-02 20:40:41,032 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:41,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:41,032 INFO L208 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] [2022-11-02 20:40:41,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:40:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,034 INFO L85 PathProgramCache]: Analyzing trace with hash 816539065, now seen corresponding path program 1 times [2022-11-02 20:40:41,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870347573] [2022-11-02 20:40:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870347573] [2022-11-02 20:40:41,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870347573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:41,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:41,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768729935] [2022-11-02 20:40:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:41,155 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 45 [2022-11-02 20:40:41,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:41,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 45 [2022-11-02 20:40:41,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:41,206 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-02 20:40:41,207 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-02 20:40:41,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 75 events. 6/75 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 148 event pairs, 2 based on Foata normal form. 13/85 useless extension candidates. Maximal degree in co-relation 37. Up to 13 conditions per place. [2022-11-02 20:40:41,208 INFO L137 encePairwiseOnDemand]: 38/45 looper letters, 11 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2022-11-02 20:40:41,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 131 flow [2022-11-02 20:40:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2022-11-02 20:40:41,211 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9037037037037037 [2022-11-02 20:40:41,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2022-11-02 20:40:41,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2022-11-02 20:40:41,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:41,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2022-11-02 20:40:41,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,215 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 102 flow. Second operand 3 states and 122 transitions. [2022-11-02 20:40:41,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 131 flow [2022-11-02 20:40:41,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 129 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:41,218 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 107 flow [2022-11-02 20:40:41,218 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-11-02 20:40:41,219 INFO L287 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-02 20:40:41,219 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 107 flow [2022-11-02 20:40:41,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:41,220 INFO L208 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] [2022-11-02 20:40:41,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:40:41,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:40:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash -217358121, now seen corresponding path program 1 times [2022-11-02 20:40:41,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860570791] [2022-11-02 20:40:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860570791] [2022-11-02 20:40:41,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860570791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:41,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:41,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554120540] [2022-11-02 20:40:41,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:41,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:41,323 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 45 [2022-11-02 20:40:41,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:41,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 45 [2022-11-02 20:40:41,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:41,371 INFO L130 PetriNetUnfolder]: 7/74 cut-off events. [2022-11-02 20:40:41,371 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-02 20:40:41,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 74 events. 7/74 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 143 event pairs, 2 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 72. Up to 10 conditions per place. [2022-11-02 20:40:41,373 INFO L137 encePairwiseOnDemand]: 41/45 looper letters, 10 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-02 20:40:41,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 138 flow [2022-11-02 20:40:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2022-11-02 20:40:41,375 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8592592592592593 [2022-11-02 20:40:41,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2022-11-02 20:40:41,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2022-11-02 20:40:41,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:41,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2022-11-02 20:40:41,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,379 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 107 flow. Second operand 3 states and 116 transitions. [2022-11-02 20:40:41,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 138 flow [2022-11-02 20:40:41,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:40:41,383 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 110 flow [2022-11-02 20:40:41,383 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-11-02 20:40:41,384 INFO L287 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-02 20:40:41,384 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 110 flow [2022-11-02 20:40:41,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:41,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:40:41,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:40:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1984575946, now seen corresponding path program 1 times [2022-11-02 20:40:41,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465240974] [2022-11-02 20:40:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:41,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:41,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:41,424 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:41,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:40:41,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:40:41,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 20:40:41,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:40:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:40:41,426 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:40:41,427 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:41,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:40:41,459 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:41,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 53 transitions, 127 flow [2022-11-02 20:40:41,480 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-02 20:40:41,480 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:40:41,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 90 events. 4/90 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 73. Up to 8 conditions per place. [2022-11-02 20:40:41,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 53 transitions, 127 flow [2022-11-02 20:40:41,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 53 transitions, 127 flow [2022-11-02 20:40:41,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:41,485 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:41,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:40:41,492 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-02 20:40:41,492 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:41,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:41,493 INFO L208 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] [2022-11-02 20:40:41,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:40:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1995165472, now seen corresponding path program 1 times [2022-11-02 20:40:41,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601078559] [2022-11-02 20:40:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:41,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:41,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601078559] [2022-11-02 20:40:41,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601078559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:41,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:41,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:41,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314199272] [2022-11-02 20:40:41,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:41,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:41,576 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 53 [2022-11-02 20:40:41,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:41,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 53 [2022-11-02 20:40:41,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:41,677 INFO L130 PetriNetUnfolder]: 59/242 cut-off events. [2022-11-02 20:40:41,678 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-11-02 20:40:41,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 242 events. 59/242 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1132 event pairs, 23 based on Foata normal form. 56/270 useless extension candidates. Maximal degree in co-relation 108. Up to 95 conditions per place. [2022-11-02 20:40:41,682 INFO L137 encePairwiseOnDemand]: 44/53 looper letters, 17 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-02 20:40:41,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 183 flow [2022-11-02 20:40:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2022-11-02 20:40:41,684 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8930817610062893 [2022-11-02 20:40:41,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2022-11-02 20:40:41,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2022-11-02 20:40:41,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:41,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2022-11-02 20:40:41,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,688 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 127 flow. Second operand 3 states and 142 transitions. [2022-11-02 20:40:41,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 183 flow [2022-11-02 20:40:41,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 175 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:41,691 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 137 flow [2022-11-02 20:40:41,691 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-11-02 20:40:41,692 INFO L287 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2022-11-02 20:40:41,692 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 137 flow [2022-11-02 20:40:41,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:41,693 INFO L208 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] [2022-11-02 20:40:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:40:41,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:40:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1152270226, now seen corresponding path program 1 times [2022-11-02 20:40:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719638282] [2022-11-02 20:40:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:40:41,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:41,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719638282] [2022-11-02 20:40:41,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719638282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:41,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:41,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:41,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721270168] [2022-11-02 20:40:41,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:41,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:41,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:41,765 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 53 [2022-11-02 20:40:41,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:41,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 53 [2022-11-02 20:40:41,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:41,846 INFO L130 PetriNetUnfolder]: 53/239 cut-off events. [2022-11-02 20:40:41,847 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-11-02 20:40:41,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 239 events. 53/239 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1043 event pairs, 17 based on Foata normal form. 23/254 useless extension candidates. Maximal degree in co-relation 266. Up to 57 conditions per place. [2022-11-02 20:40:41,852 INFO L137 encePairwiseOnDemand]: 47/53 looper letters, 15 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2022-11-02 20:40:41,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 187 flow [2022-11-02 20:40:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2022-11-02 20:40:41,854 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8490566037735849 [2022-11-02 20:40:41,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2022-11-02 20:40:41,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2022-11-02 20:40:41,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:41,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2022-11-02 20:40:41,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,858 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 137 flow. Second operand 3 states and 135 transitions. [2022-11-02 20:40:41,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 187 flow [2022-11-02 20:40:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:40:41,861 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 142 flow [2022-11-02 20:40:41,861 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2022-11-02 20:40:41,862 INFO L287 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2022-11-02 20:40:41,863 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 142 flow [2022-11-02 20:40:41,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:41,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:41,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:40:41,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:40:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 620408523, now seen corresponding path program 1 times [2022-11-02 20:40:41,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349490310] [2022-11-02 20:40:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:41,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:41,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:41,903 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:41,903 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:40:41,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:40:41,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:40:41,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:40:41,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:40:41,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:40:41,929 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:40:41,930 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:41,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:40:41,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:41,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 61 transitions, 154 flow [2022-11-02 20:40:41,994 INFO L130 PetriNetUnfolder]: 5/111 cut-off events. [2022-11-02 20:40:41,995 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:40:41,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 111 events. 5/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2022-11-02 20:40:41,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 61 transitions, 154 flow [2022-11-02 20:40:41,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 61 transitions, 154 flow [2022-11-02 20:40:41,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:42,006 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:42,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:40:42,014 INFO L130 PetriNetUnfolder]: 2/31 cut-off events. [2022-11-02 20:40:42,014 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:42,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:42,015 INFO L208 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] [2022-11-02 20:40:42,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:40:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1251690471, now seen corresponding path program 1 times [2022-11-02 20:40:42,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:42,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749875904] [2022-11-02 20:40:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749875904] [2022-11-02 20:40:42,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749875904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:42,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:42,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581624686] [2022-11-02 20:40:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:42,132 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 61 [2022-11-02 20:40:42,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:42,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 61 [2022-11-02 20:40:42,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:42,431 INFO L130 PetriNetUnfolder]: 421/1000 cut-off events. [2022-11-02 20:40:42,431 INFO L131 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2022-11-02 20:40:42,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 1000 events. 421/1000 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6340 event pairs, 231 based on Foata normal form. 251/1048 useless extension candidates. Maximal degree in co-relation 596. Up to 608 conditions per place. [2022-11-02 20:40:42,450 INFO L137 encePairwiseOnDemand]: 50/61 looper letters, 23 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-11-02 20:40:42,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 239 flow [2022-11-02 20:40:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2022-11-02 20:40:42,454 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8852459016393442 [2022-11-02 20:40:42,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2022-11-02 20:40:42,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2022-11-02 20:40:42,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:42,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2022-11-02 20:40:42,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,462 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 154 flow. Second operand 3 states and 162 transitions. [2022-11-02 20:40:42,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 239 flow [2022-11-02 20:40:42,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 221 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:42,468 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 167 flow [2022-11-02 20:40:42,468 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2022-11-02 20:40:42,470 INFO L287 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2022-11-02 20:40:42,471 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 167 flow [2022-11-02 20:40:42,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:42,472 INFO L208 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] [2022-11-02 20:40:42,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:40:42,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:40:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:42,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1254058345, now seen corresponding path program 1 times [2022-11-02 20:40:42,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:42,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945246113] [2022-11-02 20:40:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:42,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945246113] [2022-11-02 20:40:42,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945246113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:42,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:42,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541458866] [2022-11-02 20:40:42,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:42,553 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 61 [2022-11-02 20:40:42,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:42,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 61 [2022-11-02 20:40:42,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:42,755 INFO L130 PetriNetUnfolder]: 283/916 cut-off events. [2022-11-02 20:40:42,755 INFO L131 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-11-02 20:40:42,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 916 events. 283/916 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6405 event pairs, 59 based on Foata normal form. 163/1046 useless extension candidates. Maximal degree in co-relation 1631. Up to 260 conditions per place. [2022-11-02 20:40:42,768 INFO L137 encePairwiseOnDemand]: 53/61 looper letters, 20 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2022-11-02 20:40:42,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 236 flow [2022-11-02 20:40:42,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2022-11-02 20:40:42,770 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8415300546448088 [2022-11-02 20:40:42,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2022-11-02 20:40:42,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2022-11-02 20:40:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:42,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2022-11-02 20:40:42,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,773 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 167 flow. Second operand 3 states and 154 transitions. [2022-11-02 20:40:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 236 flow [2022-11-02 20:40:42,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:40:42,777 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 174 flow [2022-11-02 20:40:42,777 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-11-02 20:40:42,778 INFO L287 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2022-11-02 20:40:42,779 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 174 flow [2022-11-02 20:40:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:42,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:40:42,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:40:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 744623267, now seen corresponding path program 1 times [2022-11-02 20:40:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:42,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955934942] [2022-11-02 20:40:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:42,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:42,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:42,813 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:42,813 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:40:42,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:40:42,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:40:42,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:40:42,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:40:42,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:40:42,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:40:42,815 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:40:42,816 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:42,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:40:42,835 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:42,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 69 transitions, 183 flow [2022-11-02 20:40:42,852 INFO L130 PetriNetUnfolder]: 6/132 cut-off events. [2022-11-02 20:40:42,852 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:40:42,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 132 events. 6/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 192 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2022-11-02 20:40:42,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 69 transitions, 183 flow [2022-11-02 20:40:42,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 69 transitions, 183 flow [2022-11-02 20:40:42,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:42,856 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:42,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:40:42,859 INFO L130 PetriNetUnfolder]: 2/31 cut-off events. [2022-11-02 20:40:42,859 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:42,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:42,860 INFO L208 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] [2022-11-02 20:40:42,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:40:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:42,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1967171630, now seen corresponding path program 1 times [2022-11-02 20:40:42,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:42,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812597966] [2022-11-02 20:40:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812597966] [2022-11-02 20:40:42,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812597966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:42,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:42,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:42,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690506664] [2022-11-02 20:40:42,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:42,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:42,919 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 69 [2022-11-02 20:40:42,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:42,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:42,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 69 [2022-11-02 20:40:42,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:43,958 INFO L130 PetriNetUnfolder]: 2584/4717 cut-off events. [2022-11-02 20:40:43,958 INFO L131 PetriNetUnfolder]: For 3401/3401 co-relation queries the response was YES. [2022-11-02 20:40:43,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9803 conditions, 4717 events. 2584/4717 cut-off events. For 3401/3401 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33310 event pairs, 864 based on Foata normal form. 1064/4709 useless extension candidates. Maximal degree in co-relation 6342. Up to 3488 conditions per place. [2022-11-02 20:40:44,040 INFO L137 encePairwiseOnDemand]: 56/69 looper letters, 29 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2022-11-02 20:40:44,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 299 flow [2022-11-02 20:40:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2022-11-02 20:40:44,042 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8792270531400966 [2022-11-02 20:40:44,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2022-11-02 20:40:44,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2022-11-02 20:40:44,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:44,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2022-11-02 20:40:44,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,048 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 183 flow. Second operand 3 states and 182 transitions. [2022-11-02 20:40:44,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 299 flow [2022-11-02 20:40:44,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 267 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:44,056 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 197 flow [2022-11-02 20:40:44,056 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2022-11-02 20:40:44,059 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-02 20:40:44,059 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 197 flow [2022-11-02 20:40:44,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:44,060 INFO L208 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] [2022-11-02 20:40:44,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:40:44,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:40:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:44,111 INFO L85 PathProgramCache]: Analyzing trace with hash 454492430, now seen corresponding path program 1 times [2022-11-02 20:40:44,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795515863] [2022-11-02 20:40:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:44,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:40:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795515863] [2022-11-02 20:40:44,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795515863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:44,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:44,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324058145] [2022-11-02 20:40:44,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:44,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:44,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:44,169 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 69 [2022-11-02 20:40:44,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:44,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 69 [2022-11-02 20:40:44,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:44,902 INFO L130 PetriNetUnfolder]: 1323/3694 cut-off events. [2022-11-02 20:40:44,902 INFO L131 PetriNetUnfolder]: For 1408/1408 co-relation queries the response was YES. [2022-11-02 20:40:44,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6706 conditions, 3694 events. 1323/3694 cut-off events. For 1408/1408 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33665 event pairs, 293 based on Foata normal form. 928/4487 useless extension candidates. Maximal degree in co-relation 6642. Up to 1123 conditions per place. [2022-11-02 20:40:44,957 INFO L137 encePairwiseOnDemand]: 59/69 looper letters, 25 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-11-02 20:40:44,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 285 flow [2022-11-02 20:40:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2022-11-02 20:40:44,960 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8357487922705314 [2022-11-02 20:40:44,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2022-11-02 20:40:44,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2022-11-02 20:40:44,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:44,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2022-11-02 20:40:44,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,963 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 197 flow. Second operand 3 states and 173 transitions. [2022-11-02 20:40:44,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 285 flow [2022-11-02 20:40:44,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:40:44,967 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 206 flow [2022-11-02 20:40:44,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2022-11-02 20:40:44,970 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, -6 predicate places. [2022-11-02 20:40:44,970 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 206 flow [2022-11-02 20:40:44,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:44,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:44,971 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:40:44,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:40:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash -576744180, now seen corresponding path program 1 times [2022-11-02 20:40:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:44,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448761505] [2022-11-02 20:40:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:44,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:45,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:45,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:45,027 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:45,027 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-02 20:40:45,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-02 20:40:45,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-02 20:40:45,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-02 20:40:45,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-02 20:40:45,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-02 20:40:45,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-02 20:40:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:40:45,028 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:40:45,029 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:45,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-02 20:40:45,053 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:45,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 77 transitions, 214 flow [2022-11-02 20:40:45,074 INFO L130 PetriNetUnfolder]: 7/153 cut-off events. [2022-11-02 20:40:45,074 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:40:45,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 153 events. 7/153 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 235 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 151. Up to 14 conditions per place. [2022-11-02 20:40:45,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 77 transitions, 214 flow [2022-11-02 20:40:45,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 77 transitions, 214 flow [2022-11-02 20:40:45,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:45,078 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:45,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-02 20:40:45,081 INFO L130 PetriNetUnfolder]: 1/30 cut-off events. [2022-11-02 20:40:45,082 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:45,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:45,082 INFO L208 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] [2022-11-02 20:40:45,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-02 20:40:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash 151278677, now seen corresponding path program 1 times [2022-11-02 20:40:45,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:45,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019788426] [2022-11-02 20:40:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:45,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:45,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:45,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019788426] [2022-11-02 20:40:45,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019788426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:45,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:45,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310289494] [2022-11-02 20:40:45,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:45,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:45,140 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-11-02 20:40:45,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:45,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:45,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-11-02 20:40:45,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:50,563 INFO L130 PetriNetUnfolder]: 14408/23143 cut-off events. [2022-11-02 20:40:50,563 INFO L131 PetriNetUnfolder]: For 21004/21004 co-relation queries the response was YES. [2022-11-02 20:40:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49387 conditions, 23143 events. 14408/23143 cut-off events. For 21004/21004 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 183756 event pairs, 9424 based on Foata normal form. 4464/21535 useless extension candidates. Maximal degree in co-relation 13922. Up to 18519 conditions per place. [2022-11-02 20:40:51,102 INFO L137 encePairwiseOnDemand]: 62/77 looper letters, 35 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-11-02 20:40:51,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 87 transitions, 363 flow [2022-11-02 20:40:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2022-11-02 20:40:51,104 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8744588744588745 [2022-11-02 20:40:51,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2022-11-02 20:40:51,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2022-11-02 20:40:51,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:51,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2022-11-02 20:40:51,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:51,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:51,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:51,108 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 214 flow. Second operand 3 states and 202 transitions. [2022-11-02 20:40:51,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 87 transitions, 363 flow [2022-11-02 20:40:51,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 313 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:51,119 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 227 flow [2022-11-02 20:40:51,121 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2022-11-02 20:40:51,122 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2022-11-02 20:40:51,122 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 227 flow [2022-11-02 20:40:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:51,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:51,123 INFO L208 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] [2022-11-02 20:40:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:40:51,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-02 20:40:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1190406981, now seen corresponding path program 1 times [2022-11-02 20:40:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:51,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575003883] [2022-11-02 20:40:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:51,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575003883] [2022-11-02 20:40:51,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575003883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:51,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:51,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:51,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166391394] [2022-11-02 20:40:51,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:51,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:51,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:51,273 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-11-02 20:40:51,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:51,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:51,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-11-02 20:40:51,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:53,777 INFO L130 PetriNetUnfolder]: 5635/13690 cut-off events. [2022-11-02 20:40:53,778 INFO L131 PetriNetUnfolder]: For 6823/6852 co-relation queries the response was YES. [2022-11-02 20:40:53,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 13690 events. 5635/13690 cut-off events. For 6823/6852 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 144070 event pairs, 2538 based on Foata normal form. 4368/17135 useless extension candidates. Maximal degree in co-relation 13752. Up to 4511 conditions per place. [2022-11-02 20:40:53,985 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 30 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2022-11-02 20:40:53,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 334 flow [2022-11-02 20:40:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:40:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2022-11-02 20:40:53,988 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2022-11-02 20:40:53,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2022-11-02 20:40:53,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2022-11-02 20:40:53,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:53,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2022-11-02 20:40:53,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:53,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:53,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:53,990 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 227 flow. Second operand 3 states and 192 transitions. [2022-11-02 20:40:53,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 334 flow [2022-11-02 20:40:53,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:40:53,994 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 238 flow [2022-11-02 20:40:53,994 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2022-11-02 20:40:53,995 INFO L287 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2022-11-02 20:40:53,996 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 238 flow [2022-11-02 20:40:53,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:53,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:53,996 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:53,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:40:53,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-02 20:40:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash 907606544, now seen corresponding path program 1 times [2022-11-02 20:40:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:53,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725225717] [2022-11-02 20:40:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:54,027 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:54,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:54,061 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:54,061 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-02 20:40:54,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-11-02 20:40:54,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-11-02 20:40:54,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-11-02 20:40:54,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-11-02 20:40:54,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-11-02 20:40:54,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-11-02 20:40:54,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-11-02 20:40:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:40:54,078 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:40:54,079 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:54,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-02 20:40:54,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:54,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 85 transitions, 247 flow [2022-11-02 20:40:54,127 INFO L130 PetriNetUnfolder]: 8/174 cut-off events. [2022-11-02 20:40:54,127 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-02 20:40:54,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 174 events. 8/174 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 270 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 180. Up to 16 conditions per place. [2022-11-02 20:40:54,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 85 transitions, 247 flow [2022-11-02 20:40:54,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 85 transitions, 247 flow [2022-11-02 20:40:54,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:54,131 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:54,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-02 20:40:54,133 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-02 20:40:54,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:40:54,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:54,133 INFO L208 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] [2022-11-02 20:40:54,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-02 20:40:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 98979356, now seen corresponding path program 1 times [2022-11-02 20:40:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:54,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117354482] [2022-11-02 20:40:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:54,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:54,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117354482] [2022-11-02 20:40:54,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117354482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:54,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:54,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29032098] [2022-11-02 20:40:54,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:54,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:54,186 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 85 [2022-11-02 20:40:54,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:54,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:54,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 85 [2022-11-02 20:40:54,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:41:14,764 INFO L130 PetriNetUnfolder]: 75117/111330 cut-off events. [2022-11-02 20:41:14,764 INFO L131 PetriNetUnfolder]: For 116553/116553 co-relation queries the response was YES. [2022-11-02 20:41:15,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239848 conditions, 111330 events. 75117/111330 cut-off events. For 116553/116553 co-relation queries the response was YES. Maximal size of possible extension queue 5092. Compared 899579 event pairs, 29991 based on Foata normal form. 18820/100778 useless extension candidates. Maximal degree in co-relation 156380. Up to 93041 conditions per place. [2022-11-02 20:41:16,989 INFO L137 encePairwiseOnDemand]: 68/85 looper letters, 41 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2022-11-02 20:41:16,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 431 flow [2022-11-02 20:41:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:41:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-02 20:41:16,991 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8705882352941177 [2022-11-02 20:41:16,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-02 20:41:16,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-02 20:41:16,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:41:16,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-02 20:41:16,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:16,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:16,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:16,994 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 247 flow. Second operand 3 states and 222 transitions. [2022-11-02 20:41:16,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 431 flow [2022-11-02 20:41:17,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 98 transitions, 359 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-02 20:41:17,068 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 257 flow [2022-11-02 20:41:17,069 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2022-11-02 20:41:17,069 INFO L287 CegarLoopForPetriNet]: 99 programPoint places, -3 predicate places. [2022-11-02 20:41:17,070 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 257 flow [2022-11-02 20:41:17,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:17,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:41:17,070 INFO L208 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] [2022-11-02 20:41:17,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:41:17,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-02 20:41:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash 314136048, now seen corresponding path program 1 times [2022-11-02 20:41:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891293452] [2022-11-02 20:41:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:41:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:17,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891293452] [2022-11-02 20:41:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891293452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:17,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:17,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:41:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777377228] [2022-11-02 20:41:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:17,135 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 85 [2022-11-02 20:41:17,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:17,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:41:17,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 85 [2022-11-02 20:41:17,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:41:27,533 INFO L130 PetriNetUnfolder]: 24837/60570 cut-off events. [2022-11-02 20:41:27,534 INFO L131 PetriNetUnfolder]: For 32579/32579 co-relation queries the response was YES. [2022-11-02 20:41:28,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105798 conditions, 60570 events. 24837/60570 cut-off events. For 32579/32579 co-relation queries the response was YES. Maximal size of possible extension queue 3523. Compared 789902 event pairs, 7506 based on Foata normal form. 22113/79785 useless extension candidates. Maximal degree in co-relation 105732. Up to 23603 conditions per place. [2022-11-02 20:41:28,449 INFO L137 encePairwiseOnDemand]: 71/85 looper letters, 35 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2022-11-02 20:41:28,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 98 transitions, 383 flow [2022-11-02 20:41:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:41:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2022-11-02 20:41:28,452 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8274509803921568 [2022-11-02 20:41:28,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2022-11-02 20:41:28,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2022-11-02 20:41:28,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:41:28,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2022-11-02 20:41:28,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:28,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:28,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:28,456 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 257 flow. Second operand 3 states and 211 transitions. [2022-11-02 20:41:28,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 98 transitions, 383 flow [2022-11-02 20:41:28,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:41:28,466 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 270 flow [2022-11-02 20:41:28,466 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2022-11-02 20:41:28,467 INFO L287 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2022-11-02 20:41:28,467 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 270 flow [2022-11-02 20:41:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:28,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:41:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 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] [2022-11-02 20:41:28,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:41:28,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-02 20:41:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -82625427, now seen corresponding path program 1 times [2022-11-02 20:41:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:28,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598421262] [2022-11-02 20:41:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:41:28,518 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:41:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:41:28,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:41:28,563 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:41:28,564 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-02 20:41:28,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-11-02 20:41:28,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-11-02 20:41:28,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-11-02 20:41:28,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-11-02 20:41:28,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-11-02 20:41:28,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-11-02 20:41:28,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-11-02 20:41:28,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-11-02 20:41:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:41:28,570 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:41:28,571 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:41:28,572 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-02 20:41:28,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:41:28,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 93 transitions, 282 flow [2022-11-02 20:41:28,646 INFO L130 PetriNetUnfolder]: 9/195 cut-off events. [2022-11-02 20:41:28,646 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:41:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 195 events. 9/195 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 211. Up to 18 conditions per place. [2022-11-02 20:41:28,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 93 transitions, 282 flow [2022-11-02 20:41:28,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 93 transitions, 282 flow [2022-11-02 20:41:28,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:41:28,655 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;@410dd3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:41:28,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-02 20:41:28,658 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-02 20:41:28,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:41:28,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:41:28,659 INFO L208 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] [2022-11-02 20:41:28,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-02 20:41:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1810271875, now seen corresponding path program 1 times [2022-11-02 20:41:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598057228] [2022-11-02 20:41:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598057228] [2022-11-02 20:41:28,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598057228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:28,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:28,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:41:28,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723089440] [2022-11-02 20:41:28,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:28,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:28,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:28,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:28,727 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 93 [2022-11-02 20:41:28,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:28,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:41:28,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 93 [2022-11-02 20:41:28,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand