./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:47:46,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:47:46,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:47:47,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:47:47,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:47:47,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:47:47,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:47:47,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:47:47,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:47:47,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:47:47,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:47:47,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:47:47,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:47:47,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:47:47,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:47:47,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:47:47,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:47:47,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:47:47,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:47:47,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:47:47,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:47:47,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:47:47,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:47:47,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:47:47,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:47:47,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:47:47,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:47:47,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:47:47,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:47:47,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:47:47,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:47:47,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:47:47,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:47:47,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:47:47,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:47:47,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:47:47,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:47:47,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:47:47,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:47:47,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:47:47,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:47:47,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:47:47,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:47:47,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:47:47,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:47:47,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:47:47,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:47:47,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:47:47,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:47:47,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:47:47,150 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:47:47,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:47:47,150 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:47:47,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:47:47,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:47:47,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:47:47,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:47:47,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:47:47,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:47:47,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:47:47,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:47:47,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:47:47,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:47:47,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:47:47,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:47:47,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:47:47,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:47:47,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:47:47,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:47:47,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:47:47,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:47:47,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:47:47,155 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:47:47,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:47:47,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:47:47,156 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_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2022-11-21 13:47:47,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:47:47,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:47:47,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:47:47,537 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:47:47,538 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:47:47,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-11-21 13:47:50,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:47:50,744 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:47:50,747 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-11-21 13:47:50,764 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/data/e8a26c376/14620fe55ab1430ca51955873f126927/FLAG8d7861407 [2022-11-21 13:47:50,783 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/data/e8a26c376/14620fe55ab1430ca51955873f126927 [2022-11-21 13:47:50,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:47:50,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:47:50,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:47:50,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:47:50,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:47:50,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:50" (1/1) ... [2022-11-21 13:47:50,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee4bbc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:50, skipping insertion in model container [2022-11-21 13:47:50,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:50" (1/1) ... [2022-11-21 13:47:50,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:47:50,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:47:51,297 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-11-21 13:47:51,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:47:51,343 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:47:51,391 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-11-21 13:47:51,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:47:51,432 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:47:51,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51 WrapperNode [2022-11-21 13:47:51,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:47:51,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:47:51,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:47:51,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:47:51,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,501 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-21 13:47:51,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:47:51,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:47:51,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:47:51,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:47:51,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,535 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:47:51,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:47:51,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:47:51,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:47:51,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (1/1) ... [2022-11-21 13:47:51,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:47:51,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:51,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:47:51,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:47:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:47:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:47:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 13:47:51,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:47:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:47:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-21 13:47:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-21 13:47:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:47:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:47:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:47:51,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:47:51,638 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 13:47:51,782 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:47:51,784 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:47:52,118 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:47:52,127 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:47:52,128 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-21 13:47:52,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:52 BoogieIcfgContainer [2022-11-21 13:47:52,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:47:52,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:47:52,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:47:52,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:47:52,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:47:50" (1/3) ... [2022-11-21 13:47:52,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeed0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:52, skipping insertion in model container [2022-11-21 13:47:52,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:51" (2/3) ... [2022-11-21 13:47:52,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeed0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:52, skipping insertion in model container [2022-11-21 13:47:52,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:52" (3/3) ... [2022-11-21 13:47:52,141 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2022-11-21 13:47:52,152 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 13:47:52,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:47:52,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:47:52,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:47:52,254 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-21 13:47:52,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2022-11-21 13:47:52,423 INFO L130 PetriNetUnfolder]: 17/149 cut-off events. [2022-11-21 13:47:52,423 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 13:47:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 17/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 354 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2022-11-21 13:47:52,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2022-11-21 13:47:52,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2022-11-21 13:47:52,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:47:52,454 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:47:52,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:47:52,476 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-21 13:47:52,476 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:47:52,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:52,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:52,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1459745198, now seen corresponding path program 1 times [2022-11-21 13:47:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:52,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211266981] [2022-11-21 13:47:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:52,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:52,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211266981] [2022-11-21 13:47:52,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211266981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:52,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:52,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:47:52,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135456837] [2022-11-21 13:47:52,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:52,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:47:52,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:47:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:47:52,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 114 [2022-11-21 13:47:52,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 223 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:52,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:52,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 114 [2022-11-21 13:47:52,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:52,889 INFO L130 PetriNetUnfolder]: 0/126 cut-off events. [2022-11-21 13:47:52,889 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 13:47:52,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 126 events. 0/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 16/136 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-21 13:47:52,891 INFO L137 encePairwiseOnDemand]: 103/114 looper letters, 1 selfloop transitions, 0 changer transitions 15/97 dead transitions. [2022-11-21 13:47:52,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 201 flow [2022-11-21 13:47:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:47:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:47:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 212 transitions. [2022-11-21 13:47:52,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9298245614035088 [2022-11-21 13:47:52,910 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 212 transitions. [2022-11-21 13:47:52,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 212 transitions. [2022-11-21 13:47:52,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:52,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 212 transitions. [2022-11-21 13:47:52,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.0) internal successors, (212), 2 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) [2022-11-21 13:47:52,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:52,929 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:52,931 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 223 flow. Second operand 2 states and 212 transitions. [2022-11-21 13:47:52,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 201 flow [2022-11-21 13:47:52,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 201 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:52,940 INFO L231 Difference]: Finished difference. Result has 101 places, 82 transitions, 169 flow [2022-11-21 13:47:52,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=169, PETRI_PLACES=101, PETRI_TRANSITIONS=82} [2022-11-21 13:47:52,947 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2022-11-21 13:47:52,947 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 82 transitions, 169 flow [2022-11-21 13:47:52,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:52,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:52,948 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:47:52,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:52,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1656258703, now seen corresponding path program 1 times [2022-11-21 13:47:52,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:52,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556572728] [2022-11-21 13:47:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:52,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:53,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556572728] [2022-11-21 13:47:53,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556572728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:53,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:53,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:47:53,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435762389] [2022-11-21 13:47:53,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:47:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:47:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:47:53,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 114 [2022-11-21 13:47:53,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 82 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:53,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 114 [2022-11-21 13:47:53,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:53,275 INFO L130 PetriNetUnfolder]: 0/86 cut-off events. [2022-11-21 13:47:53,275 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:47:53,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 86 events. 0/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-21 13:47:53,280 INFO L137 encePairwiseOnDemand]: 111/114 looper letters, 8 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-11-21 13:47:53,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 193 flow [2022-11-21 13:47:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:47:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:47:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-11-21 13:47:53,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.847953216374269 [2022-11-21 13:47:53,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-11-21 13:47:53,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-11-21 13:47:53,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:53,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-11-21 13:47:53,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,291 INFO L175 Difference]: Start difference. First operand has 101 places, 82 transitions, 169 flow. Second operand 3 states and 290 transitions. [2022-11-21 13:47:53,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 193 flow [2022-11-21 13:47:53,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:53,295 INFO L231 Difference]: Finished difference. Result has 89 places, 82 transitions, 177 flow [2022-11-21 13:47:53,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2022-11-21 13:47:53,297 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2022-11-21 13:47:53,297 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 177 flow [2022-11-21 13:47:53,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:53,298 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:53,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:47:53,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1881921463, now seen corresponding path program 1 times [2022-11-21 13:47:53,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:53,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072468597] [2022-11-21 13:47:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:53,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:47:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:53,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:47:53,440 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:47:53,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:47:53,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:47:53,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:47:53,444 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-21 13:47:53,447 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:47:53,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 13:47:53,477 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 13:47:53,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 314 flow [2022-11-21 13:47:53,517 INFO L130 PetriNetUnfolder]: 31/243 cut-off events. [2022-11-21 13:47:53,517 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 13:47:53,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 31/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 721 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-11-21 13:47:53,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 148 transitions, 314 flow [2022-11-21 13:47:53,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 148 transitions, 314 flow [2022-11-21 13:47:53,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:47:53,525 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:47:53,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:47:53,535 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-21 13:47:53,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:47:53,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:53,536 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:53,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:53,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1865005030, now seen corresponding path program 1 times [2022-11-21 13:47:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:53,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596184052] [2022-11-21 13:47:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:53,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:53,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596184052] [2022-11-21 13:47:53,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596184052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:53,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:53,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:47:53,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504862415] [2022-11-21 13:47:53,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:53,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:47:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:47:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:47:53,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 148 [2022-11-21 13:47:53,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 148 transitions, 314 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:53,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 148 [2022-11-21 13:47:53,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:53,618 INFO L130 PetriNetUnfolder]: 3/212 cut-off events. [2022-11-21 13:47:53,618 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-21 13:47:53,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 212 events. 3/212 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 525 event pairs, 0 based on Foata normal form. 42/244 useless extension candidates. Maximal degree in co-relation 135. Up to 7 conditions per place. [2022-11-21 13:47:53,620 INFO L137 encePairwiseOnDemand]: 131/148 looper letters, 2 selfloop transitions, 0 changer transitions 21/130 dead transitions. [2022-11-21 13:47:53,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 286 flow [2022-11-21 13:47:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:47:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:47:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-11-21 13:47:53,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9222972972972973 [2022-11-21 13:47:53,622 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-11-21 13:47:53,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-11-21 13:47:53,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:53,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-11-21 13:47:53,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,626 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,626 INFO L175 Difference]: Start difference. First operand has 134 places, 148 transitions, 314 flow. Second operand 2 states and 273 transitions. [2022-11-21 13:47:53,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 286 flow [2022-11-21 13:47:53,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 130 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:53,629 INFO L231 Difference]: Finished difference. Result has 134 places, 109 transitions, 230 flow [2022-11-21 13:47:53,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=134, PETRI_TRANSITIONS=109} [2022-11-21 13:47:53,631 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 0 predicate places. [2022-11-21 13:47:53,631 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 109 transitions, 230 flow [2022-11-21 13:47:53,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:53,632 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:47:53,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1668491525, now seen corresponding path program 1 times [2022-11-21 13:47:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:53,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054701556] [2022-11-21 13:47:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:53,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054701556] [2022-11-21 13:47:53,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054701556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:53,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:53,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:47:53,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753376765] [2022-11-21 13:47:53,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:53,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:47:53,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:47:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:47:53,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 148 [2022-11-21 13:47:53,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 109 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:53,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 148 [2022-11-21 13:47:53,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:53,771 INFO L130 PetriNetUnfolder]: 0/132 cut-off events. [2022-11-21 13:47:53,771 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 13:47:53,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 132 events. 0/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-21 13:47:53,772 INFO L137 encePairwiseOnDemand]: 145/148 looper letters, 11 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2022-11-21 13:47:53,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 113 transitions, 264 flow [2022-11-21 13:47:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:47:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:47:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-11-21 13:47:53,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8355855855855856 [2022-11-21 13:47:53,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-11-21 13:47:53,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-11-21 13:47:53,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:53,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-11-21 13:47:53,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,780 INFO L175 Difference]: Start difference. First operand has 134 places, 109 transitions, 230 flow. Second operand 3 states and 371 transitions. [2022-11-21 13:47:53,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 113 transitions, 264 flow [2022-11-21 13:47:53,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 113 transitions, 262 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:53,783 INFO L231 Difference]: Finished difference. Result has 118 places, 110 transitions, 240 flow [2022-11-21 13:47:53,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=118, PETRI_TRANSITIONS=110} [2022-11-21 13:47:53,784 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -16 predicate places. [2022-11-21 13:47:53,785 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 110 transitions, 240 flow [2022-11-21 13:47:53,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:53,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:53,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:53,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:47:53,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1178735508, now seen corresponding path program 1 times [2022-11-21 13:47:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:53,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692374258] [2022-11-21 13:47:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:53,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:53,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:53,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692374258] [2022-11-21 13:47:53,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692374258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:47:53,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307272717] [2022-11-21 13:47:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:53,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:53,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:47:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:54,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:47:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:54,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:54,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307272717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:54,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:47:54,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:47:54,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272485316] [2022-11-21 13:47:54,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:54,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:47:54,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:54,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:47:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:47:54,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 148 [2022-11-21 13:47:54,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 110 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:54,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 148 [2022-11-21 13:47:54,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:54,334 INFO L130 PetriNetUnfolder]: 0/112 cut-off events. [2022-11-21 13:47:54,334 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 13:47:54,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 0/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-21 13:47:54,336 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-11-21 13:47:54,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 262 flow [2022-11-21 13:47:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:47:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:47:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1080 transitions. [2022-11-21 13:47:54,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2022-11-21 13:47:54,339 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1080 transitions. [2022-11-21 13:47:54,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1080 transitions. [2022-11-21 13:47:54,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:54,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1080 transitions. [2022-11-21 13:47:54,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.0) internal successors, (1080), 9 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,347 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,348 INFO L175 Difference]: Start difference. First operand has 118 places, 110 transitions, 240 flow. Second operand 9 states and 1080 transitions. [2022-11-21 13:47:54,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 262 flow [2022-11-21 13:47:54,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:47:54,351 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 234 flow [2022-11-21 13:47:54,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-11-21 13:47:54,356 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -19 predicate places. [2022-11-21 13:47:54,356 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 234 flow [2022-11-21 13:47:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:54,359 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:54,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:47:54,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:54,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1979046043, now seen corresponding path program 1 times [2022-11-21 13:47:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:54,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002936815] [2022-11-21 13:47:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:54,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:54,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:47:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:54,622 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:47:54,622 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:47:54,623 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:47:54,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:47:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:47:54,623 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 13:47:54,624 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:47:54,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 13:47:54,665 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 13:47:54,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-11-21 13:47:54,727 INFO L130 PetriNetUnfolder]: 50/370 cut-off events. [2022-11-21 13:47:54,727 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-21 13:47:54,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 50/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1244 event pairs, 1 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 251. Up to 16 conditions per place. [2022-11-21 13:47:54,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 182 transitions, 394 flow [2022-11-21 13:47:54,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 182 transitions, 394 flow [2022-11-21 13:47:54,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:47:54,739 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:47:54,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:47:54,747 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-21 13:47:54,748 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:47:54,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:54,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:54,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1591663588, now seen corresponding path program 1 times [2022-11-21 13:47:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:54,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612809698] [2022-11-21 13:47:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:54,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:54,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612809698] [2022-11-21 13:47:54,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612809698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:54,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:47:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184018706] [2022-11-21 13:47:54,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:54,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:47:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:47:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:47:54,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 182 [2022-11-21 13:47:54,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 182 transitions, 394 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:54,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 182 [2022-11-21 13:47:54,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:54,899 INFO L130 PetriNetUnfolder]: 8/324 cut-off events. [2022-11-21 13:47:54,900 INFO L131 PetriNetUnfolder]: For 50/58 co-relation queries the response was YES. [2022-11-21 13:47:54,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 324 events. 8/324 cut-off events. For 50/58 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1018 event pairs, 1 based on Foata normal form. 104/412 useless extension candidates. Maximal degree in co-relation 226. Up to 16 conditions per place. [2022-11-21 13:47:54,902 INFO L137 encePairwiseOnDemand]: 159/182 looper letters, 3 selfloop transitions, 0 changer transitions 22/158 dead transitions. [2022-11-21 13:47:54,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 158 transitions, 358 flow [2022-11-21 13:47:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:47:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:47:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2022-11-21 13:47:54,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9148351648351648 [2022-11-21 13:47:54,904 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2022-11-21 13:47:54,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2022-11-21 13:47:54,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:54,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2022-11-21 13:47:54,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,907 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,908 INFO L175 Difference]: Start difference. First operand has 163 places, 182 transitions, 394 flow. Second operand 2 states and 333 transitions. [2022-11-21 13:47:54,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 158 transitions, 358 flow [2022-11-21 13:47:54,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 158 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:54,913 INFO L231 Difference]: Finished difference. Result has 163 places, 136 transitions, 293 flow [2022-11-21 13:47:54,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=293, PETRI_PLACES=163, PETRI_TRANSITIONS=136} [2022-11-21 13:47:54,916 INFO L288 CegarLoopForPetriNet]: 163 programPoint places, 0 predicate places. [2022-11-21 13:47:54,916 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 136 transitions, 293 flow [2022-11-21 13:47:54,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:54,917 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:54,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:47:54,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:54,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1788177093, now seen corresponding path program 1 times [2022-11-21 13:47:54,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:54,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925361212] [2022-11-21 13:47:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:54,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:54,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925361212] [2022-11-21 13:47:54,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925361212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:54,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:54,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:47:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837261455] [2022-11-21 13:47:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:47:54,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:47:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:47:54,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 182 [2022-11-21 13:47:54,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 136 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:54,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:54,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 182 [2022-11-21 13:47:54,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:55,034 INFO L130 PetriNetUnfolder]: 0/178 cut-off events. [2022-11-21 13:47:55,034 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 13:47:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 178 events. 0/178 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 354 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-21 13:47:55,035 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 12 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2022-11-21 13:47:55,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 140 transitions, 329 flow [2022-11-21 13:47:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:47:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:47:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2022-11-21 13:47:55,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8241758241758241 [2022-11-21 13:47:55,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2022-11-21 13:47:55,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2022-11-21 13:47:55,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:55,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2022-11-21 13:47:55,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,044 INFO L175 Difference]: Start difference. First operand has 163 places, 136 transitions, 293 flow. Second operand 3 states and 450 transitions. [2022-11-21 13:47:55,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 140 transitions, 329 flow [2022-11-21 13:47:55,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 140 transitions, 323 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:55,047 INFO L231 Difference]: Finished difference. Result has 147 places, 137 transitions, 299 flow [2022-11-21 13:47:55,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=147, PETRI_TRANSITIONS=137} [2022-11-21 13:47:55,049 INFO L288 CegarLoopForPetriNet]: 163 programPoint places, -16 predicate places. [2022-11-21 13:47:55,050 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 137 transitions, 299 flow [2022-11-21 13:47:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:55,050 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:47:55,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:55,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1863745046, now seen corresponding path program 1 times [2022-11-21 13:47:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413155843] [2022-11-21 13:47:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:55,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:55,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413155843] [2022-11-21 13:47:55,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413155843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:47:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695718245] [2022-11-21 13:47:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:55,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:55,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:55,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:47:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:47:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:55,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:55,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695718245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:55,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:47:55,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:47:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532719965] [2022-11-21 13:47:55,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:47:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:47:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:47:55,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 182 [2022-11-21 13:47:55,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 137 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:55,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 182 [2022-11-21 13:47:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:55,584 INFO L130 PetriNetUnfolder]: 0/158 cut-off events. [2022-11-21 13:47:55,584 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-21 13:47:55,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 158 events. 0/158 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 239 event pairs, 0 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-21 13:47:55,585 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 13 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2022-11-21 13:47:55,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 147 transitions, 365 flow [2022-11-21 13:47:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:47:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:47:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1320 transitions. [2022-11-21 13:47:55,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8058608058608059 [2022-11-21 13:47:55,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1320 transitions. [2022-11-21 13:47:55,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1320 transitions. [2022-11-21 13:47:55,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:55,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1320 transitions. [2022-11-21 13:47:55,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.66666666666666) internal successors, (1320), 9 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,597 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,598 INFO L175 Difference]: Start difference. First operand has 147 places, 137 transitions, 299 flow. Second operand 9 states and 1320 transitions. [2022-11-21 13:47:55,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 147 transitions, 365 flow [2022-11-21 13:47:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:47:55,601 INFO L231 Difference]: Finished difference. Result has 157 places, 143 transitions, 347 flow [2022-11-21 13:47:55,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2022-11-21 13:47:55,602 INFO L288 CegarLoopForPetriNet]: 163 programPoint places, -6 predicate places. [2022-11-21 13:47:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 347 flow [2022-11-21 13:47:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:55,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:55,604 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:55,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:47:55,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:55,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash -806067410, now seen corresponding path program 1 times [2022-11-21 13:47:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:55,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955268045] [2022-11-21 13:47:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:55,831 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:47:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:55,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:47:55,863 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:47:55,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:47:55,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:47:55,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 13:47:55,864 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 13:47:55,864 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:47:55,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 13:47:55,921 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 13:47:55,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 216 transitions, 476 flow [2022-11-21 13:47:56,028 INFO L130 PetriNetUnfolder]: 81/565 cut-off events. [2022-11-21 13:47:56,029 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-21 13:47:56,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 565 events. 81/565 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2171 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-11-21 13:47:56,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 216 transitions, 476 flow [2022-11-21 13:47:56,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 216 transitions, 476 flow [2022-11-21 13:47:56,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:47:56,044 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:47:56,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:47:56,050 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-21 13:47:56,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:47:56,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:56,051 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:56,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1055150836, now seen corresponding path program 1 times [2022-11-21 13:47:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015638596] [2022-11-21 13:47:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:56,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:56,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:56,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015638596] [2022-11-21 13:47:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015638596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:56,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:56,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:47:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552155301] [2022-11-21 13:47:56,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:47:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:47:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:47:56,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 216 [2022-11-21 13:47:56,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 476 flow. Second operand has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:56,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 216 [2022-11-21 13:47:56,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:56,207 INFO L130 PetriNetUnfolder]: 21/500 cut-off events. [2022-11-21 13:47:56,208 INFO L131 PetriNetUnfolder]: For 129/151 co-relation queries the response was YES. [2022-11-21 13:47:56,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 500 events. 21/500 cut-off events. For 129/151 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1973 event pairs, 6 based on Foata normal form. 248/722 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-11-21 13:47:56,213 INFO L137 encePairwiseOnDemand]: 187/216 looper letters, 4 selfloop transitions, 0 changer transitions 23/186 dead transitions. [2022-11-21 13:47:56,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 186 transitions, 432 flow [2022-11-21 13:47:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:47:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:47:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 393 transitions. [2022-11-21 13:47:56,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9097222222222222 [2022-11-21 13:47:56,215 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 393 transitions. [2022-11-21 13:47:56,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 393 transitions. [2022-11-21 13:47:56,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:56,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 393 transitions. [2022-11-21 13:47:56,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 196.5) internal successors, (393), 2 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,218 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,218 INFO L175 Difference]: Start difference. First operand has 192 places, 216 transitions, 476 flow. Second operand 2 states and 393 transitions. [2022-11-21 13:47:56,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 186 transitions, 432 flow [2022-11-21 13:47:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 186 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:56,223 INFO L231 Difference]: Finished difference. Result has 192 places, 163 transitions, 358 flow [2022-11-21 13:47:56,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=358, PETRI_PLACES=192, PETRI_TRANSITIONS=163} [2022-11-21 13:47:56,224 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, 0 predicate places. [2022-11-21 13:47:56,224 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 163 transitions, 358 flow [2022-11-21 13:47:56,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:56,225 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:56,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 13:47:56,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:56,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash 858637331, now seen corresponding path program 1 times [2022-11-21 13:47:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:56,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952663487] [2022-11-21 13:47:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952663487] [2022-11-21 13:47:56,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952663487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:56,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:56,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:47:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038932233] [2022-11-21 13:47:56,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:56,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:47:56,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:47:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:47:56,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 216 [2022-11-21 13:47:56,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 163 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:56,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 216 [2022-11-21 13:47:56,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:56,376 INFO L130 PetriNetUnfolder]: 0/224 cut-off events. [2022-11-21 13:47:56,377 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-21 13:47:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 224 events. 0/224 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 515 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-21 13:47:56,378 INFO L137 encePairwiseOnDemand]: 213/216 looper letters, 13 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2022-11-21 13:47:56,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 167 transitions, 396 flow [2022-11-21 13:47:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:47:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:47:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-21 13:47:56,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.816358024691358 [2022-11-21 13:47:56,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-21 13:47:56,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-21 13:47:56,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:56,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-21 13:47:56,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,384 INFO L175 Difference]: Start difference. First operand has 192 places, 163 transitions, 358 flow. Second operand 3 states and 529 transitions. [2022-11-21 13:47:56,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 167 transitions, 396 flow [2022-11-21 13:47:56,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 167 transitions, 384 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:56,388 INFO L231 Difference]: Finished difference. Result has 176 places, 164 transitions, 358 flow [2022-11-21 13:47:56,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2022-11-21 13:47:56,390 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, -16 predicate places. [2022-11-21 13:47:56,390 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 358 flow [2022-11-21 13:47:56,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:56,391 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 13:47:56,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash -15546974, now seen corresponding path program 1 times [2022-11-21 13:47:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:56,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126848047] [2022-11-21 13:47:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:56,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126848047] [2022-11-21 13:47:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126848047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:47:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742225148] [2022-11-21 13:47:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:56,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:56,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:56,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:56,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:47:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:56,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:47:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:56,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:56,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742225148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:56,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:47:56,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:47:56,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404886597] [2022-11-21 13:47:56,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:56,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:47:56,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:47:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:47:56,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-11-21 13:47:56,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 358 flow. Second operand has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:56,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-11-21 13:47:56,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:56,809 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-21 13:47:56,809 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 13:47:56,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-21 13:47:56,810 INFO L137 encePairwiseOnDemand]: 210/216 looper letters, 14 selfloop transitions, 9 changer transitions 0/174 dead transitions. [2022-11-21 13:47:56,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 174 transitions, 426 flow [2022-11-21 13:47:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:47:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:47:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1555 transitions. [2022-11-21 13:47:56,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7998971193415638 [2022-11-21 13:47:56,815 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1555 transitions. [2022-11-21 13:47:56,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1555 transitions. [2022-11-21 13:47:56,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:56,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1555 transitions. [2022-11-21 13:47:56,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.77777777777777) internal successors, (1555), 9 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,824 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,824 INFO L175 Difference]: Start difference. First operand has 176 places, 164 transitions, 358 flow. Second operand 9 states and 1555 transitions. [2022-11-21 13:47:56,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 174 transitions, 426 flow [2022-11-21 13:47:56,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 174 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:47:56,828 INFO L231 Difference]: Finished difference. Result has 186 places, 170 transitions, 406 flow [2022-11-21 13:47:56,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=170} [2022-11-21 13:47:56,829 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, -6 predicate places. [2022-11-21 13:47:56,829 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 170 transitions, 406 flow [2022-11-21 13:47:56,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:56,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:56,831 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:56,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:47:57,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:57,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1341330269, now seen corresponding path program 1 times [2022-11-21 13:47:57,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:57,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097325904] [2022-11-21 13:47:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:57,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097325904] [2022-11-21 13:47:57,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097325904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:47:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999069131] [2022-11-21 13:47:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:57,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:57,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:57,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:47:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:47:57,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:57,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999069131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:57,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:47:57,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:47:57,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167406245] [2022-11-21 13:47:57,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:57,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:47:57,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:47:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:47:57,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-11-21 13:47:57,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 170 transitions, 406 flow. Second operand has 18 states, 18 states have (on average 172.61111111111111) internal successors, (3107), 18 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:57,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:57,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-11-21 13:47:57,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:57,793 INFO L130 PetriNetUnfolder]: 0/184 cut-off events. [2022-11-21 13:47:57,793 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-21 13:47:57,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 184 events. 0/184 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-21 13:47:57,794 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 15 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2022-11-21 13:47:57,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 170 transitions, 474 flow [2022-11-21 13:47:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 13:47:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-21 13:47:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2580 transitions. [2022-11-21 13:47:57,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7962962962962963 [2022-11-21 13:47:57,800 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2580 transitions. [2022-11-21 13:47:57,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2580 transitions. [2022-11-21 13:47:57,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:57,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2580 transitions. [2022-11-21 13:47:57,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:57,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:57,814 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:57,815 INFO L175 Difference]: Start difference. First operand has 186 places, 170 transitions, 406 flow. Second operand 15 states and 2580 transitions. [2022-11-21 13:47:57,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 170 transitions, 474 flow [2022-11-21 13:47:57,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 170 transitions, 457 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-21 13:47:57,819 INFO L231 Difference]: Finished difference. Result has 186 places, 163 transitions, 406 flow [2022-11-21 13:47:57,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2022-11-21 13:47:57,820 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, -6 predicate places. [2022-11-21 13:47:57,820 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 406 flow [2022-11-21 13:47:57,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 172.61111111111111) internal successors, (3107), 18 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:57,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:57,822 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:57,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:47:58,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 13:47:58,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -291249534, now seen corresponding path program 1 times [2022-11-21 13:47:58,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:58,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179789504] [2022-11-21 13:47:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:58,056 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:47:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:47:58,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:47:58,090 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:47:58,091 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:47:58,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:47:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 13:47:58,091 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-21 13:47:58,095 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:47:58,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-21 13:47:58,133 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-21 13:47:58,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 560 flow [2022-11-21 13:47:58,350 INFO L130 PetriNetUnfolder]: 140/900 cut-off events. [2022-11-21 13:47:58,351 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-21 13:47:58,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4063 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 610. Up to 80 conditions per place. [2022-11-21 13:47:58,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 250 transitions, 560 flow [2022-11-21 13:47:58,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 250 transitions, 560 flow [2022-11-21 13:47:58,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:47:58,372 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:47:58,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:47:58,379 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-21 13:47:58,379 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:47:58,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:58,379 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:58,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1215513710, now seen corresponding path program 1 times [2022-11-21 13:47:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:58,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224862945] [2022-11-21 13:47:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:58,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224862945] [2022-11-21 13:47:58,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224862945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:58,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:58,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:47:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334203802] [2022-11-21 13:47:58,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:47:58,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:47:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:47:58,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 250 [2022-11-21 13:47:58,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 250 transitions, 560 flow. Second operand has 2 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:58,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 250 [2022-11-21 13:47:58,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:58,605 INFO L130 PetriNetUnfolder]: 54/808 cut-off events. [2022-11-21 13:47:58,605 INFO L131 PetriNetUnfolder]: For 289/307 co-relation queries the response was YES. [2022-11-21 13:47:58,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 808 events. 54/808 cut-off events. For 289/307 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3793 event pairs, 23 based on Foata normal form. 574/1338 useless extension candidates. Maximal degree in co-relation 581. Up to 86 conditions per place. [2022-11-21 13:47:58,615 INFO L137 encePairwiseOnDemand]: 215/250 looper letters, 5 selfloop transitions, 0 changer transitions 24/214 dead transitions. [2022-11-21 13:47:58,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 214 transitions, 508 flow [2022-11-21 13:47:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:47:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:47:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 453 transitions. [2022-11-21 13:47:58,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.906 [2022-11-21 13:47:58,618 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 453 transitions. [2022-11-21 13:47:58,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 453 transitions. [2022-11-21 13:47:58,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:58,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 453 transitions. [2022-11-21 13:47:58,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,621 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,621 INFO L175 Difference]: Start difference. First operand has 221 places, 250 transitions, 560 flow. Second operand 2 states and 453 transitions. [2022-11-21 13:47:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 214 transitions, 508 flow [2022-11-21 13:47:58,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 214 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:58,626 INFO L231 Difference]: Finished difference. Result has 221 places, 190 transitions, 425 flow [2022-11-21 13:47:58,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=425, PETRI_PLACES=221, PETRI_TRANSITIONS=190} [2022-11-21 13:47:58,627 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 0 predicate places. [2022-11-21 13:47:58,627 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 190 transitions, 425 flow [2022-11-21 13:47:58,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:58,628 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 13:47:58,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1019000205, now seen corresponding path program 1 times [2022-11-21 13:47:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:58,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106510807] [2022-11-21 13:47:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:58,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:58,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106510807] [2022-11-21 13:47:58,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106510807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:47:58,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:47:58,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:47:58,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103042972] [2022-11-21 13:47:58,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:47:58,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:47:58,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:47:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:47:58,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 250 [2022-11-21 13:47:58,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 190 transitions, 425 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:58,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 250 [2022-11-21 13:47:58,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:58,739 INFO L130 PetriNetUnfolder]: 0/270 cut-off events. [2022-11-21 13:47:58,739 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-21 13:47:58,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 270 events. 0/270 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 677 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-21 13:47:58,741 INFO L137 encePairwiseOnDemand]: 247/250 looper letters, 14 selfloop transitions, 2 changer transitions 0/194 dead transitions. [2022-11-21 13:47:58,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 194 transitions, 465 flow [2022-11-21 13:47:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:47:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:47:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2022-11-21 13:47:58,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8106666666666666 [2022-11-21 13:47:58,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2022-11-21 13:47:58,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2022-11-21 13:47:58,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:58,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2022-11-21 13:47:58,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,748 INFO L175 Difference]: Start difference. First operand has 221 places, 190 transitions, 425 flow. Second operand 3 states and 608 transitions. [2022-11-21 13:47:58,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 194 transitions, 465 flow [2022-11-21 13:47:58,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 194 transitions, 445 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-21 13:47:58,753 INFO L231 Difference]: Finished difference. Result has 205 places, 191 transitions, 417 flow [2022-11-21 13:47:58,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=417, PETRI_PLACES=205, PETRI_TRANSITIONS=191} [2022-11-21 13:47:58,754 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -16 predicate places. [2022-11-21 13:47:58,754 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 191 transitions, 417 flow [2022-11-21 13:47:58,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:58,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:58,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 13:47:58,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1866604868, now seen corresponding path program 1 times [2022-11-21 13:47:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:58,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989541982] [2022-11-21 13:47:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989541982] [2022-11-21 13:47:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989541982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:47:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601413851] [2022-11-21 13:47:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:58,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:58,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:47:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:47:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:59,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:59,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601413851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:59,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:47:59,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:47:59,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355330880] [2022-11-21 13:47:59,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:59,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:47:59,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:47:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:47:59,062 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 250 [2022-11-21 13:47:59,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 191 transitions, 417 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:59,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:59,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 250 [2022-11-21 13:47:59,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:47:59,193 INFO L130 PetriNetUnfolder]: 0/250 cut-off events. [2022-11-21 13:47:59,193 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 13:47:59,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 250 events. 0/250 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 563 event pairs, 0 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-21 13:47:59,194 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 15 selfloop transitions, 9 changer transitions 0/201 dead transitions. [2022-11-21 13:47:59,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 201 transitions, 487 flow [2022-11-21 13:47:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:47:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:47:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1790 transitions. [2022-11-21 13:47:59,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7955555555555556 [2022-11-21 13:47:59,200 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1790 transitions. [2022-11-21 13:47:59,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1790 transitions. [2022-11-21 13:47:59,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:47:59,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1790 transitions. [2022-11-21 13:47:59,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.88888888888889) internal successors, (1790), 9 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:59,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:59,211 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:59,211 INFO L175 Difference]: Start difference. First operand has 205 places, 191 transitions, 417 flow. Second operand 9 states and 1790 transitions. [2022-11-21 13:47:59,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 201 transitions, 487 flow [2022-11-21 13:47:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 201 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:47:59,216 INFO L231 Difference]: Finished difference. Result has 215 places, 197 transitions, 465 flow [2022-11-21 13:47:59,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=215, PETRI_TRANSITIONS=197} [2022-11-21 13:47:59,217 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -6 predicate places. [2022-11-21 13:47:59,217 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 197 transitions, 465 flow [2022-11-21 13:47:59,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:59,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:47:59,219 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:47:59,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:47:59,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:59,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:47:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:47:59,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1812030391, now seen corresponding path program 1 times [2022-11-21 13:47:59,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:47:59,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110740165] [2022-11-21 13:47:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:59,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:47:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:47:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110740165] [2022-11-21 13:47:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110740165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:47:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534626710] [2022-11-21 13:47:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:47:59,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:47:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:47:59,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:47:59,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:47:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:47:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:47:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:47:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:59,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:47:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:47:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534626710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:47:59,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:47:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:47:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258788583] [2022-11-21 13:47:59,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:47:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:47:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:47:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:47:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:47:59,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 250 [2022-11-21 13:47:59,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 197 transitions, 465 flow. Second operand has 18 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:47:59,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:47:59,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 250 [2022-11-21 13:47:59,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:00,199 INFO L130 PetriNetUnfolder]: 0/220 cut-off events. [2022-11-21 13:48:00,199 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-21 13:48:00,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 220 events. 0/220 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-21 13:48:00,200 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 18 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2022-11-21 13:48:00,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 202 transitions, 569 flow [2022-11-21 13:48:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:48:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 13:48:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3565 transitions. [2022-11-21 13:48:00,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922222222222223 [2022-11-21 13:48:00,210 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3565 transitions. [2022-11-21 13:48:00,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3565 transitions. [2022-11-21 13:48:00,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:00,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3565 transitions. [2022-11-21 13:48:00,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.05555555555554) internal successors, (3565), 18 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:00,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:00,229 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:00,229 INFO L175 Difference]: Start difference. First operand has 215 places, 197 transitions, 465 flow. Second operand 18 states and 3565 transitions. [2022-11-21 13:48:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 202 transitions, 569 flow [2022-11-21 13:48:00,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 202 transitions, 548 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-21 13:48:00,234 INFO L231 Difference]: Finished difference. Result has 218 places, 193 transitions, 484 flow [2022-11-21 13:48:00,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=484, PETRI_PLACES=218, PETRI_TRANSITIONS=193} [2022-11-21 13:48:00,236 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -3 predicate places. [2022-11-21 13:48:00,236 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 193 transitions, 484 flow [2022-11-21 13:48:00,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:00,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:00,237 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:00,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:00,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:00,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 309502231, now seen corresponding path program 1 times [2022-11-21 13:48:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622763586] [2022-11-21 13:48:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:00,470 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:48:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:00,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:48:00,511 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:48:00,511 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:48:00,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:48:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 13:48:00,513 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-21 13:48:00,514 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:48:00,514 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-21 13:48:00,557 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-21 13:48:00,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 284 transitions, 646 flow [2022-11-21 13:48:00,963 INFO L130 PetriNetUnfolder]: 263/1523 cut-off events. [2022-11-21 13:48:00,963 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-21 13:48:00,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 1523 events. 263/1523 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8473 event pairs, 72 based on Foata normal form. 0/1317 useless extension candidates. Maximal degree in co-relation 999. Up to 192 conditions per place. [2022-11-21 13:48:00,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 284 transitions, 646 flow [2022-11-21 13:48:01,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 284 transitions, 646 flow [2022-11-21 13:48:01,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:48:01,013 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:48:01,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:48:01,021 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-21 13:48:01,021 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:48:01,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:01,022 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:01,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:01,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1110574966, now seen corresponding path program 1 times [2022-11-21 13:48:01,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:01,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530584017] [2022-11-21 13:48:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:01,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:01,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530584017] [2022-11-21 13:48:01,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530584017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:01,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:01,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:48:01,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111054236] [2022-11-21 13:48:01,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:01,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:48:01,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:01,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:48:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:48:01,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 284 [2022-11-21 13:48:01,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 284 transitions, 646 flow. Second operand has 2 states, 2 states have (on average 230.5) internal successors, (461), 2 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:01,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 284 [2022-11-21 13:48:01,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:01,470 INFO L130 PetriNetUnfolder]: 135/1388 cut-off events. [2022-11-21 13:48:01,470 INFO L131 PetriNetUnfolder]: For 659/697 co-relation queries the response was YES. [2022-11-21 13:48:01,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 1388 events. 135/1388 cut-off events. For 659/697 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8148 event pairs, 72 based on Foata normal form. 1306/2616 useless extension candidates. Maximal degree in co-relation 992. Up to 199 conditions per place. [2022-11-21 13:48:01,485 INFO L137 encePairwiseOnDemand]: 243/284 looper letters, 6 selfloop transitions, 0 changer transitions 25/242 dead transitions. [2022-11-21 13:48:01,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 242 transitions, 586 flow [2022-11-21 13:48:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:48:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:48:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 513 transitions. [2022-11-21 13:48:01,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.903169014084507 [2022-11-21 13:48:01,488 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 513 transitions. [2022-11-21 13:48:01,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 513 transitions. [2022-11-21 13:48:01,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:01,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 513 transitions. [2022-11-21 13:48:01,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 256.5) internal successors, (513), 2 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,494 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,494 INFO L175 Difference]: Start difference. First operand has 250 places, 284 transitions, 646 flow. Second operand 2 states and 513 transitions. [2022-11-21 13:48:01,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 242 transitions, 586 flow [2022-11-21 13:48:01,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 242 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:01,505 INFO L231 Difference]: Finished difference. Result has 250 places, 217 transitions, 494 flow [2022-11-21 13:48:01,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=494, PETRI_PLACES=250, PETRI_TRANSITIONS=217} [2022-11-21 13:48:01,507 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 0 predicate places. [2022-11-21 13:48:01,507 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 217 transitions, 494 flow [2022-11-21 13:48:01,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 230.5) internal successors, (461), 2 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:01,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:01,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 13:48:01,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1307088471, now seen corresponding path program 1 times [2022-11-21 13:48:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:01,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162714843] [2022-11-21 13:48:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162714843] [2022-11-21 13:48:01,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162714843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:01,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:48:01,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089487875] [2022-11-21 13:48:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:48:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:48:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:48:01,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 284 [2022-11-21 13:48:01,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 217 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:01,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 284 [2022-11-21 13:48:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:01,650 INFO L130 PetriNetUnfolder]: 0/316 cut-off events. [2022-11-21 13:48:01,651 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-21 13:48:01,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 316 events. 0/316 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 840 event pairs, 0 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-21 13:48:01,652 INFO L137 encePairwiseOnDemand]: 281/284 looper letters, 15 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2022-11-21 13:48:01,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 221 transitions, 536 flow [2022-11-21 13:48:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:48:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:48:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2022-11-21 13:48:01,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8063380281690141 [2022-11-21 13:48:01,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2022-11-21 13:48:01,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2022-11-21 13:48:01,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:01,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2022-11-21 13:48:01,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,660 INFO L175 Difference]: Start difference. First operand has 250 places, 217 transitions, 494 flow. Second operand 3 states and 687 transitions. [2022-11-21 13:48:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 221 transitions, 536 flow [2022-11-21 13:48:01,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 221 transitions, 506 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:01,665 INFO L231 Difference]: Finished difference. Result has 234 places, 218 transitions, 476 flow [2022-11-21 13:48:01,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=234, PETRI_TRANSITIONS=218} [2022-11-21 13:48:01,666 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -16 predicate places. [2022-11-21 13:48:01,666 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 218 transitions, 476 flow [2022-11-21 13:48:01,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:01,667 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:01,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 13:48:01,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1173015864, now seen corresponding path program 1 times [2022-11-21 13:48:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105421675] [2022-11-21 13:48:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:01,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:01,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105421675] [2022-11-21 13:48:01,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105421675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:01,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775695103] [2022-11-21 13:48:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:01,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:01,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:01,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:48:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:48:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:01,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:01,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775695103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:01,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:01,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:48:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053014422] [2022-11-21 13:48:01,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:01,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:48:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:48:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:48:01,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 284 [2022-11-21 13:48:01,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 218 transitions, 476 flow. Second operand has 10 states, 10 states have (on average 224.3) internal successors, (2243), 10 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:01,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:01,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 284 [2022-11-21 13:48:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:02,124 INFO L130 PetriNetUnfolder]: 0/296 cut-off events. [2022-11-21 13:48:02,124 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-21 13:48:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 296 events. 0/296 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 725 event pairs, 0 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-21 13:48:02,125 INFO L137 encePairwiseOnDemand]: 278/284 looper letters, 16 selfloop transitions, 9 changer transitions 0/228 dead transitions. [2022-11-21 13:48:02,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 228 transitions, 548 flow [2022-11-21 13:48:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:48:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:48:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2025 transitions. [2022-11-21 13:48:02,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922535211267606 [2022-11-21 13:48:02,132 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2025 transitions. [2022-11-21 13:48:02,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2025 transitions. [2022-11-21 13:48:02,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:02,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2025 transitions. [2022-11-21 13:48:02,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:02,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:02,145 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:02,145 INFO L175 Difference]: Start difference. First operand has 234 places, 218 transitions, 476 flow. Second operand 9 states and 2025 transitions. [2022-11-21 13:48:02,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 228 transitions, 548 flow [2022-11-21 13:48:02,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 228 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:02,150 INFO L231 Difference]: Finished difference. Result has 244 places, 224 transitions, 524 flow [2022-11-21 13:48:02,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=524, PETRI_PLACES=244, PETRI_TRANSITIONS=224} [2022-11-21 13:48:02,150 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -6 predicate places. [2022-11-21 13:48:02,151 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 224 transitions, 524 flow [2022-11-21 13:48:02,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 224.3) internal successors, (2243), 10 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:02,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:02,152 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:02,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 13:48:02,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1821400819, now seen corresponding path program 1 times [2022-11-21 13:48:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:02,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123779622] [2022-11-21 13:48:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:02,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:02,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:02,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123779622] [2022-11-21 13:48:02,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123779622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:02,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129712536] [2022-11-21 13:48:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:02,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:02,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:02,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:02,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:48:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:48:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:02,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:02,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129712536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:02,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:02,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:48:02,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237865044] [2022-11-21 13:48:02,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:48:02,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:48:02,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:48:02,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 284 [2022-11-21 13:48:02,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 224 transitions, 524 flow. Second operand has 18 states, 18 states have (on average 224.61111111111111) internal successors, (4043), 18 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:02,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:02,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 284 [2022-11-21 13:48:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:03,090 INFO L130 PetriNetUnfolder]: 0/256 cut-off events. [2022-11-21 13:48:03,091 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-21 13:48:03,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 256 events. 0/256 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/260 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-21 13:48:03,092 INFO L137 encePairwiseOnDemand]: 279/284 looper letters, 21 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2022-11-21 13:48:03,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 234 transitions, 664 flow [2022-11-21 13:48:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 13:48:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 13:48:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4706 transitions. [2022-11-21 13:48:03,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7890677397719651 [2022-11-21 13:48:03,100 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4706 transitions. [2022-11-21 13:48:03,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4706 transitions. [2022-11-21 13:48:03,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:03,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4706 transitions. [2022-11-21 13:48:03,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 224.0952380952381) internal successors, (4706), 21 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:03,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:03,124 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:03,125 INFO L175 Difference]: Start difference. First operand has 244 places, 224 transitions, 524 flow. Second operand 21 states and 4706 transitions. [2022-11-21 13:48:03,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 234 transitions, 664 flow [2022-11-21 13:48:03,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 234 transitions, 639 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-21 13:48:03,130 INFO L231 Difference]: Finished difference. Result has 250 places, 223 transitions, 562 flow [2022-11-21 13:48:03,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=562, PETRI_PLACES=250, PETRI_TRANSITIONS=223} [2022-11-21 13:48:03,131 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 0 predicate places. [2022-11-21 13:48:03,131 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 223 transitions, 562 flow [2022-11-21 13:48:03,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 224.61111111111111) internal successors, (4043), 18 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:03,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:03,133 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:03,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:03,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:03,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:03,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1967318675, now seen corresponding path program 1 times [2022-11-21 13:48:03,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:03,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53905889] [2022-11-21 13:48:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:03,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:03,359 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:48:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:03,383 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:48:03,383 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:48:03,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:48:03,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:48:03,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-21 13:48:03,384 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-21 13:48:03,385 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:48:03,385 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-21 13:48:03,419 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-21 13:48:03,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 318 transitions, 734 flow [2022-11-21 13:48:04,256 INFO L130 PetriNetUnfolder]: 530/2738 cut-off events. [2022-11-21 13:48:04,257 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-21 13:48:04,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 2738 events. 530/2738 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18327 event pairs, 201 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 1741. Up to 448 conditions per place. [2022-11-21 13:48:04,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 318 transitions, 734 flow [2022-11-21 13:48:04,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 318 transitions, 734 flow [2022-11-21 13:48:04,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:48:04,326 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:48:04,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:48:04,332 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-21 13:48:04,333 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:48:04,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:04,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:04,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1628147896, now seen corresponding path program 1 times [2022-11-21 13:48:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933625571] [2022-11-21 13:48:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:04,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:04,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933625571] [2022-11-21 13:48:04,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933625571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:04,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:04,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:48:04,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278952875] [2022-11-21 13:48:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:48:04,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:48:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:48:04,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 318 [2022-11-21 13:48:04,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 318 transitions, 734 flow. Second operand has 2 states, 2 states have (on average 256.5) internal successors, (513), 2 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:04,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:04,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 318 [2022-11-21 13:48:04,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:05,258 INFO L130 PetriNetUnfolder]: 328/2528 cut-off events. [2022-11-21 13:48:05,258 INFO L131 PetriNetUnfolder]: For 1452/1480 co-relation queries the response was YES. [2022-11-21 13:48:05,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 2528 events. 328/2528 cut-off events. For 1452/1480 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18083 event pairs, 201 based on Foata normal form. 2940/5324 useless extension candidates. Maximal degree in co-relation 1804. Up to 456 conditions per place. [2022-11-21 13:48:05,283 INFO L137 encePairwiseOnDemand]: 271/318 looper letters, 7 selfloop transitions, 0 changer transitions 26/270 dead transitions. [2022-11-21 13:48:05,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 270 transitions, 666 flow [2022-11-21 13:48:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:48:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:48:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 573 transitions. [2022-11-21 13:48:05,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9009433962264151 [2022-11-21 13:48:05,286 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 573 transitions. [2022-11-21 13:48:05,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 573 transitions. [2022-11-21 13:48:05,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:05,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 573 transitions. [2022-11-21 13:48:05,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,290 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,290 INFO L175 Difference]: Start difference. First operand has 279 places, 318 transitions, 734 flow. Second operand 2 states and 573 transitions. [2022-11-21 13:48:05,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 270 transitions, 666 flow [2022-11-21 13:48:05,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 270 transitions, 666 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:05,296 INFO L231 Difference]: Finished difference. Result has 279 places, 244 transitions, 565 flow [2022-11-21 13:48:05,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=565, PETRI_PLACES=279, PETRI_TRANSITIONS=244} [2022-11-21 13:48:05,297 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, 0 predicate places. [2022-11-21 13:48:05,297 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 244 transitions, 565 flow [2022-11-21 13:48:05,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 256.5) internal successors, (513), 2 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:05,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:05,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-21 13:48:05,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1824661401, now seen corresponding path program 1 times [2022-11-21 13:48:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:05,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775781257] [2022-11-21 13:48:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:05,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775781257] [2022-11-21 13:48:05,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775781257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:05,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:48:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299525040] [2022-11-21 13:48:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:48:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:48:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:48:05,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 318 [2022-11-21 13:48:05,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 244 transitions, 565 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:05,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 318 [2022-11-21 13:48:05,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:05,540 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-21 13:48:05,540 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-21 13:48:05,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 362 events. 0/362 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1002 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-21 13:48:05,542 INFO L137 encePairwiseOnDemand]: 315/318 looper letters, 16 selfloop transitions, 2 changer transitions 0/248 dead transitions. [2022-11-21 13:48:05,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 248 transitions, 609 flow [2022-11-21 13:48:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:48:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:48:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2022-11-21 13:48:05,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8029350104821803 [2022-11-21 13:48:05,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2022-11-21 13:48:05,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2022-11-21 13:48:05,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:05,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2022-11-21 13:48:05,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,554 INFO L175 Difference]: Start difference. First operand has 279 places, 244 transitions, 565 flow. Second operand 3 states and 766 transitions. [2022-11-21 13:48:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 248 transitions, 609 flow [2022-11-21 13:48:05,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 248 transitions, 567 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:05,560 INFO L231 Difference]: Finished difference. Result has 263 places, 245 transitions, 535 flow [2022-11-21 13:48:05,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=535, PETRI_PLACES=263, PETRI_TRANSITIONS=245} [2022-11-21 13:48:05,561 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, -16 predicate places. [2022-11-21 13:48:05,561 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 245 transitions, 535 flow [2022-11-21 13:48:05,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:05,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:05,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-21 13:48:05,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash 513380630, now seen corresponding path program 1 times [2022-11-21 13:48:05,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:05,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047983235] [2022-11-21 13:48:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047983235] [2022-11-21 13:48:05,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047983235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:05,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5307161] [2022-11-21 13:48:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:05,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:05,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:05,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:05,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:48:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:48:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:05,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:05,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5307161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:05,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:05,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:48:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463670989] [2022-11-21 13:48:05,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:05,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:48:05,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:48:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:48:05,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 318 [2022-11-21 13:48:05,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 245 transitions, 535 flow. Second operand has 10 states, 10 states have (on average 250.3) internal successors, (2503), 10 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:05,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:05,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 318 [2022-11-21 13:48:05,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:06,052 INFO L130 PetriNetUnfolder]: 0/342 cut-off events. [2022-11-21 13:48:06,053 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-21 13:48:06,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 342 events. 0/342 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 884 event pairs, 0 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-21 13:48:06,054 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 17 selfloop transitions, 9 changer transitions 0/255 dead transitions. [2022-11-21 13:48:06,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 255 transitions, 609 flow [2022-11-21 13:48:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:48:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:48:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2260 transitions. [2022-11-21 13:48:06,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7896575821104123 [2022-11-21 13:48:06,062 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2260 transitions. [2022-11-21 13:48:06,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2260 transitions. [2022-11-21 13:48:06,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:06,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2260 transitions. [2022-11-21 13:48:06,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 251.11111111111111) internal successors, (2260), 9 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:06,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:06,075 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:06,075 INFO L175 Difference]: Start difference. First operand has 263 places, 245 transitions, 535 flow. Second operand 9 states and 2260 transitions. [2022-11-21 13:48:06,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 255 transitions, 609 flow [2022-11-21 13:48:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 255 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:06,081 INFO L231 Difference]: Finished difference. Result has 273 places, 251 transitions, 583 flow [2022-11-21 13:48:06,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=583, PETRI_PLACES=273, PETRI_TRANSITIONS=251} [2022-11-21 13:48:06,083 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, -6 predicate places. [2022-11-21 13:48:06,084 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 251 transitions, 583 flow [2022-11-21 13:48:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.3) internal successors, (2503), 10 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:06,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:06,085 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:06,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:06,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 13:48:06,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1369441553, now seen corresponding path program 1 times [2022-11-21 13:48:06,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:06,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752851340] [2022-11-21 13:48:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:06,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:06,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:06,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752851340] [2022-11-21 13:48:06,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752851340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:06,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228231226] [2022-11-21 13:48:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:06,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:06,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:06,446 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:06,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:48:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:48:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:06,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228231226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:06,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:06,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:48:06,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947298026] [2022-11-21 13:48:06,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:06,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:48:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:06,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:48:06,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:48:06,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 318 [2022-11-21 13:48:06,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 251 transitions, 583 flow. Second operand has 18 states, 18 states have (on average 250.61111111111111) internal successors, (4511), 18 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:06,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:06,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 318 [2022-11-21 13:48:06,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:07,182 INFO L130 PetriNetUnfolder]: 0/302 cut-off events. [2022-11-21 13:48:07,182 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-21 13:48:07,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 302 events. 0/302 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 631 event pairs, 0 based on Foata normal form. 4/306 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-21 13:48:07,183 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 21 changer transitions 0/275 dead transitions. [2022-11-21 13:48:07,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 275 transitions, 783 flow [2022-11-21 13:48:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 13:48:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 13:48:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5258 transitions. [2022-11-21 13:48:07,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.787361485474693 [2022-11-21 13:48:07,190 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5258 transitions. [2022-11-21 13:48:07,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5258 transitions. [2022-11-21 13:48:07,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:07,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5258 transitions. [2022-11-21 13:48:07,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 250.38095238095238) internal successors, (5258), 21 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:07,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:07,226 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:07,226 INFO L175 Difference]: Start difference. First operand has 273 places, 251 transitions, 583 flow. Second operand 21 states and 5258 transitions. [2022-11-21 13:48:07,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 275 transitions, 783 flow [2022-11-21 13:48:07,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 275 transitions, 769 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:07,233 INFO L231 Difference]: Finished difference. Result has 297 places, 264 transitions, 707 flow [2022-11-21 13:48:07,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=707, PETRI_PLACES=297, PETRI_TRANSITIONS=264} [2022-11-21 13:48:07,234 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, 18 predicate places. [2022-11-21 13:48:07,234 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 264 transitions, 707 flow [2022-11-21 13:48:07,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 250.61111111111111) internal successors, (4511), 18 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:07,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:07,236 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:07,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:07,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:07,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2027817468, now seen corresponding path program 1 times [2022-11-21 13:48:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:07,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669637593] [2022-11-21 13:48:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:07,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:07,466 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:48:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:07,493 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:48:07,494 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:48:07,494 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:48:07,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:48:07,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-21 13:48:07,494 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-21 13:48:07,495 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:48:07,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-21 13:48:07,529 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-21 13:48:07,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 352 transitions, 824 flow [2022-11-21 13:48:09,057 INFO L130 PetriNetUnfolder]: 1117/5169 cut-off events. [2022-11-21 13:48:09,057 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-21 13:48:09,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6254 conditions, 5169 events. 1117/5169 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41194 event pairs, 522 based on Foata normal form. 0/4555 useless extension candidates. Maximal degree in co-relation 3220. Up to 1024 conditions per place. [2022-11-21 13:48:09,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 352 transitions, 824 flow [2022-11-21 13:48:09,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 352 transitions, 824 flow [2022-11-21 13:48:09,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:48:09,197 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:48:09,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:48:09,202 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-21 13:48:09,202 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:48:09,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:09,203 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:09,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -337205080, now seen corresponding path program 1 times [2022-11-21 13:48:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193865276] [2022-11-21 13:48:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:09,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193865276] [2022-11-21 13:48:09,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193865276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:09,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:09,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:48:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194332497] [2022-11-21 13:48:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:48:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:48:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:48:09,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 352 [2022-11-21 13:48:09,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 352 transitions, 824 flow. Second operand has 2 states, 2 states have (on average 282.5) internal successors, (565), 2 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:09,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:09,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 352 [2022-11-21 13:48:09,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:10,809 INFO L130 PetriNetUnfolder]: 777/4820 cut-off events. [2022-11-21 13:48:10,809 INFO L131 PetriNetUnfolder]: For 3229/3273 co-relation queries the response was YES. [2022-11-21 13:48:10,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 4820 events. 777/4820 cut-off events. For 3229/3273 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40391 event pairs, 522 based on Foata normal form. 6564/11110 useless extension candidates. Maximal degree in co-relation 3465. Up to 1033 conditions per place. [2022-11-21 13:48:10,853 INFO L137 encePairwiseOnDemand]: 299/352 looper letters, 8 selfloop transitions, 0 changer transitions 27/298 dead transitions. [2022-11-21 13:48:10,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 298 transitions, 748 flow [2022-11-21 13:48:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:48:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:48:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 633 transitions. [2022-11-21 13:48:10,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8991477272727273 [2022-11-21 13:48:10,855 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 633 transitions. [2022-11-21 13:48:10,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 633 transitions. [2022-11-21 13:48:10,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:10,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 633 transitions. [2022-11-21 13:48:10,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 316.5) internal successors, (633), 2 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:10,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:10,858 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:10,858 INFO L175 Difference]: Start difference. First operand has 308 places, 352 transitions, 824 flow. Second operand 2 states and 633 transitions. [2022-11-21 13:48:10,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 298 transitions, 748 flow [2022-11-21 13:48:10,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 298 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:10,865 INFO L231 Difference]: Finished difference. Result has 308 places, 271 transitions, 638 flow [2022-11-21 13:48:10,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=638, PETRI_PLACES=308, PETRI_TRANSITIONS=271} [2022-11-21 13:48:10,866 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, 0 predicate places. [2022-11-21 13:48:10,866 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 271 transitions, 638 flow [2022-11-21 13:48:10,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 282.5) internal successors, (565), 2 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:10,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:10,867 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-21 13:48:10,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash -533718585, now seen corresponding path program 1 times [2022-11-21 13:48:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:10,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249493562] [2022-11-21 13:48:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:10,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249493562] [2022-11-21 13:48:10,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249493562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:10,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:10,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:48:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898639382] [2022-11-21 13:48:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:48:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:48:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:48:10,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 352 [2022-11-21 13:48:10,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 271 transitions, 638 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:10,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:10,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 352 [2022-11-21 13:48:10,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:11,021 INFO L130 PetriNetUnfolder]: 0/408 cut-off events. [2022-11-21 13:48:11,021 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-21 13:48:11,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 408 events. 0/408 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1163 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-21 13:48:11,023 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 17 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-11-21 13:48:11,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 275 transitions, 684 flow [2022-11-21 13:48:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:48:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:48:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2022-11-21 13:48:11,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8001893939393939 [2022-11-21 13:48:11,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2022-11-21 13:48:11,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2022-11-21 13:48:11,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:11,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2022-11-21 13:48:11,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,034 INFO L175 Difference]: Start difference. First operand has 308 places, 271 transitions, 638 flow. Second operand 3 states and 845 transitions. [2022-11-21 13:48:11,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 275 transitions, 684 flow [2022-11-21 13:48:11,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 275 transitions, 628 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:11,041 INFO L231 Difference]: Finished difference. Result has 292 places, 272 transitions, 594 flow [2022-11-21 13:48:11,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=594, PETRI_PLACES=292, PETRI_TRANSITIONS=272} [2022-11-21 13:48:11,042 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, -16 predicate places. [2022-11-21 13:48:11,043 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 272 transitions, 594 flow [2022-11-21 13:48:11,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:11,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-21 13:48:11,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 449456726, now seen corresponding path program 1 times [2022-11-21 13:48:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:11,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907193468] [2022-11-21 13:48:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907193468] [2022-11-21 13:48:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907193468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662598652] [2022-11-21 13:48:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:11,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:11,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:48:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:48:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:11,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662598652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:11,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:48:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958559563] [2022-11-21 13:48:11,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:11,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:48:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:48:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:48:11,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-11-21 13:48:11,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 272 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:11,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-11-21 13:48:11,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:11,639 INFO L130 PetriNetUnfolder]: 0/388 cut-off events. [2022-11-21 13:48:11,640 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-21 13:48:11,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 388 events. 0/388 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1043 event pairs, 0 based on Foata normal form. 2/390 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-21 13:48:11,641 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 18 selfloop transitions, 9 changer transitions 0/282 dead transitions. [2022-11-21 13:48:11,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 282 transitions, 670 flow [2022-11-21 13:48:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:48:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:48:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2495 transitions. [2022-11-21 13:48:11,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7875631313131313 [2022-11-21 13:48:11,645 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2495 transitions. [2022-11-21 13:48:11,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2495 transitions. [2022-11-21 13:48:11,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:11,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2495 transitions. [2022-11-21 13:48:11,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 277.22222222222223) internal successors, (2495), 9 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,653 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,654 INFO L175 Difference]: Start difference. First operand has 292 places, 272 transitions, 594 flow. Second operand 9 states and 2495 transitions. [2022-11-21 13:48:11,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 282 transitions, 670 flow [2022-11-21 13:48:11,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 282 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:11,658 INFO L231 Difference]: Finished difference. Result has 302 places, 278 transitions, 642 flow [2022-11-21 13:48:11,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=302, PETRI_TRANSITIONS=278} [2022-11-21 13:48:11,659 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, -6 predicate places. [2022-11-21 13:48:11,659 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 278 transitions, 642 flow [2022-11-21 13:48:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:11,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:11,660 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:11,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:11,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-21 13:48:11,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 456152593, now seen corresponding path program 1 times [2022-11-21 13:48:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:11,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206298841] [2022-11-21 13:48:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:11,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206298841] [2022-11-21 13:48:11,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206298841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51569646] [2022-11-21 13:48:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:12,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:12,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:12,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:48:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:48:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:12,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51569646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:12,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:12,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:48:12,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757504331] [2022-11-21 13:48:12,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:12,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:48:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:48:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:48:12,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-11-21 13:48:12,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 278 transitions, 642 flow. Second operand has 18 states, 18 states have (on average 276.6111111111111) internal successors, (4979), 18 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:12,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:12,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-11-21 13:48:12,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:12,666 INFO L130 PetriNetUnfolder]: 0/348 cut-off events. [2022-11-21 13:48:12,666 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-21 13:48:12,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 791 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-21 13:48:12,667 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 26 selfloop transitions, 21 changer transitions 0/302 dead transitions. [2022-11-21 13:48:12,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 302 transitions, 844 flow [2022-11-21 13:48:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 13:48:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 13:48:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5805 transitions. [2022-11-21 13:48:12,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7853084415584416 [2022-11-21 13:48:12,675 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5805 transitions. [2022-11-21 13:48:12,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5805 transitions. [2022-11-21 13:48:12,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:12,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5805 transitions. [2022-11-21 13:48:12,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 276.42857142857144) internal successors, (5805), 21 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:12,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:12,696 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:12,697 INFO L175 Difference]: Start difference. First operand has 302 places, 278 transitions, 642 flow. Second operand 21 states and 5805 transitions. [2022-11-21 13:48:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 302 transitions, 844 flow [2022-11-21 13:48:12,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 302 transitions, 830 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:12,703 INFO L231 Difference]: Finished difference. Result has 326 places, 291 transitions, 766 flow [2022-11-21 13:48:12,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=766, PETRI_PLACES=326, PETRI_TRANSITIONS=291} [2022-11-21 13:48:12,704 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, 18 predicate places. [2022-11-21 13:48:12,704 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 291 transitions, 766 flow [2022-11-21 13:48:12,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 276.6111111111111) internal successors, (4979), 18 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:12,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:12,706 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:12,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:12,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-21 13:48:12,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2101820155, now seen corresponding path program 1 times [2022-11-21 13:48:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:12,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289087462] [2022-11-21 13:48:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:13,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:13,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289087462] [2022-11-21 13:48:13,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289087462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:13,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323349516] [2022-11-21 13:48:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:13,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:13,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:13,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:13,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 13:48:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 13:48:13,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:13,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:13,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323349516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:13,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:13,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-21 13:48:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168863104] [2022-11-21 13:48:13,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:13,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:48:13,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:48:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 13:48:13,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-11-21 13:48:13,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 291 transitions, 766 flow. Second operand has 34 states, 34 states have (on average 276.79411764705884) internal successors, (9411), 34 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:13,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:13,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-11-21 13:48:13,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:14,454 INFO L130 PetriNetUnfolder]: 0/328 cut-off events. [2022-11-21 13:48:14,454 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-21 13:48:14,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 328 events. 0/328 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-21 13:48:14,455 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 27 selfloop transitions, 25 changer transitions 0/298 dead transitions. [2022-11-21 13:48:14,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 298 transitions, 916 flow [2022-11-21 13:48:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 13:48:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-21 13:48:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7452 transitions. [2022-11-21 13:48:14,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7840909090909091 [2022-11-21 13:48:14,468 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7452 transitions. [2022-11-21 13:48:14,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7452 transitions. [2022-11-21 13:48:14,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:14,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7452 transitions. [2022-11-21 13:48:14,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 276.0) internal successors, (7452), 27 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:14,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 352.0) internal successors, (9856), 28 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:14,495 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 352.0) internal successors, (9856), 28 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:14,495 INFO L175 Difference]: Start difference. First operand has 326 places, 291 transitions, 766 flow. Second operand 27 states and 7452 transitions. [2022-11-21 13:48:14,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 298 transitions, 916 flow [2022-11-21 13:48:14,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 298 transitions, 862 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-21 13:48:14,502 INFO L231 Difference]: Finished difference. Result has 329 places, 284 transitions, 755 flow [2022-11-21 13:48:14,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=755, PETRI_PLACES=329, PETRI_TRANSITIONS=284} [2022-11-21 13:48:14,503 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, 21 predicate places. [2022-11-21 13:48:14,504 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 284 transitions, 755 flow [2022-11-21 13:48:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 276.79411764705884) internal successors, (9411), 34 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:14,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:14,506 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:14,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:14,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-21 13:48:14,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:14,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1697246884, now seen corresponding path program 1 times [2022-11-21 13:48:14,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:14,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298131505] [2022-11-21 13:48:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:14,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:14,737 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:48:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:14,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:48:14,768 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:48:14,768 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:48:14,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:48:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-21 13:48:14,769 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-21 13:48:14,770 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:48:14,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-21 13:48:14,810 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-21 13:48:14,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 386 transitions, 916 flow [2022-11-21 13:48:17,802 INFO L130 PetriNetUnfolder]: 2408/10096 cut-off events. [2022-11-21 13:48:17,802 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-21 13:48:17,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12473 conditions, 10096 events. 2408/10096 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93489 event pairs, 1291 based on Foata normal form. 0/8958 useless extension candidates. Maximal degree in co-relation 6236. Up to 2304 conditions per place. [2022-11-21 13:48:17,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 386 transitions, 916 flow [2022-11-21 13:48:18,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 386 transitions, 916 flow [2022-11-21 13:48:18,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:48:18,123 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:48:18,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:48:18,129 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-21 13:48:18,129 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:48:18,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:18,129 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:18,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1532713814, now seen corresponding path program 1 times [2022-11-21 13:48:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:18,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908010971] [2022-11-21 13:48:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:18,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908010971] [2022-11-21 13:48:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908010971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:18,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:18,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:48:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053907188] [2022-11-21 13:48:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:48:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:48:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:48:18,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 386 [2022-11-21 13:48:18,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 386 transitions, 916 flow. Second operand has 2 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:18,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:18,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 386 [2022-11-21 13:48:18,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:21,117 INFO L130 PetriNetUnfolder]: 1802/9480 cut-off events. [2022-11-21 13:48:21,117 INFO L131 PetriNetUnfolder]: For 7126/7182 co-relation queries the response was YES. [2022-11-21 13:48:21,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14171 conditions, 9480 events. 1802/9480 cut-off events. For 7126/7182 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91193 event pairs, 1291 based on Foata normal form. 14546/23494 useless extension candidates. Maximal degree in co-relation 6919. Up to 2314 conditions per place. [2022-11-21 13:48:21,188 INFO L137 encePairwiseOnDemand]: 327/386 looper letters, 9 selfloop transitions, 0 changer transitions 28/326 dead transitions. [2022-11-21 13:48:21,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 326 transitions, 832 flow [2022-11-21 13:48:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:48:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:48:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 693 transitions. [2022-11-21 13:48:21,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976683937823834 [2022-11-21 13:48:21,191 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 693 transitions. [2022-11-21 13:48:21,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 693 transitions. [2022-11-21 13:48:21,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:21,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 693 transitions. [2022-11-21 13:48:21,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 346.5) internal successors, (693), 2 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,194 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,194 INFO L175 Difference]: Start difference. First operand has 337 places, 386 transitions, 916 flow. Second operand 2 states and 693 transitions. [2022-11-21 13:48:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 326 transitions, 832 flow [2022-11-21 13:48:21,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 326 transitions, 832 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:21,201 INFO L231 Difference]: Finished difference. Result has 337 places, 298 transitions, 713 flow [2022-11-21 13:48:21,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=713, PETRI_PLACES=337, PETRI_TRANSITIONS=298} [2022-11-21 13:48:21,202 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, 0 predicate places. [2022-11-21 13:48:21,202 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 298 transitions, 713 flow [2022-11-21 13:48:21,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:21,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-21 13:48:21,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1729227319, now seen corresponding path program 1 times [2022-11-21 13:48:21,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031268606] [2022-11-21 13:48:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:21,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:21,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:21,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031268606] [2022-11-21 13:48:21,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031268606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:21,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:21,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:48:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025144521] [2022-11-21 13:48:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:48:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:48:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:48:21,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 386 [2022-11-21 13:48:21,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 298 transitions, 713 flow. Second operand has 3 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:21,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 386 [2022-11-21 13:48:21,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:21,370 INFO L130 PetriNetUnfolder]: 0/454 cut-off events. [2022-11-21 13:48:21,370 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-21 13:48:21,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 454 events. 0/454 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1325 event pairs, 0 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-21 13:48:21,371 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 18 selfloop transitions, 2 changer transitions 0/302 dead transitions. [2022-11-21 13:48:21,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 302 transitions, 761 flow [2022-11-21 13:48:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:48:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:48:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2022-11-21 13:48:21,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7979274611398963 [2022-11-21 13:48:21,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2022-11-21 13:48:21,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2022-11-21 13:48:21,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:21,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2022-11-21 13:48:21,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,377 INFO L175 Difference]: Start difference. First operand has 337 places, 298 transitions, 713 flow. Second operand 3 states and 924 transitions. [2022-11-21 13:48:21,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 302 transitions, 761 flow [2022-11-21 13:48:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 302 transitions, 689 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:21,383 INFO L231 Difference]: Finished difference. Result has 321 places, 299 transitions, 653 flow [2022-11-21 13:48:21,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=653, PETRI_PLACES=321, PETRI_TRANSITIONS=299} [2022-11-21 13:48:21,384 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, -16 predicate places. [2022-11-21 13:48:21,384 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 299 transitions, 653 flow [2022-11-21 13:48:21,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:21,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-21 13:48:21,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 981244152, now seen corresponding path program 1 times [2022-11-21 13:48:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985815693] [2022-11-21 13:48:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:21,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985815693] [2022-11-21 13:48:21,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985815693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770653226] [2022-11-21 13:48:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:21,443 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:21,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 13:48:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:21,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:48:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:21,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770653226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:21,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:21,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:48:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526011785] [2022-11-21 13:48:21,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:21,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:48:21,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:48:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:48:21,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-11-21 13:48:21,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 299 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 302.3) internal successors, (3023), 10 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:21,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-11-21 13:48:21,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:21,919 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-21 13:48:21,920 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-21 13:48:21,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 434 events. 0/434 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1210 event pairs, 0 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-21 13:48:21,921 INFO L137 encePairwiseOnDemand]: 380/386 looper letters, 19 selfloop transitions, 9 changer transitions 0/309 dead transitions. [2022-11-21 13:48:21,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 309 transitions, 731 flow [2022-11-21 13:48:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:48:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:48:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2730 transitions. [2022-11-21 13:48:21,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7858376511226253 [2022-11-21 13:48:21,925 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2730 transitions. [2022-11-21 13:48:21,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2730 transitions. [2022-11-21 13:48:21,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:21,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2730 transitions. [2022-11-21 13:48:21,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 303.3333333333333) internal successors, (2730), 9 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 386.0) internal successors, (3860), 10 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,934 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 386.0) internal successors, (3860), 10 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,934 INFO L175 Difference]: Start difference. First operand has 321 places, 299 transitions, 653 flow. Second operand 9 states and 2730 transitions. [2022-11-21 13:48:21,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 309 transitions, 731 flow [2022-11-21 13:48:21,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 309 transitions, 729 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:21,940 INFO L231 Difference]: Finished difference. Result has 331 places, 305 transitions, 701 flow [2022-11-21 13:48:21,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=701, PETRI_PLACES=331, PETRI_TRANSITIONS=305} [2022-11-21 13:48:21,941 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, -6 predicate places. [2022-11-21 13:48:21,941 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 305 transitions, 701 flow [2022-11-21 13:48:21,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 302.3) internal successors, (3023), 10 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:21,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:21,943 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:21,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:22,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-21 13:48:22,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash -918466061, now seen corresponding path program 1 times [2022-11-21 13:48:22,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001798437] [2022-11-21 13:48:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:22,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:22,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001798437] [2022-11-21 13:48:22,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001798437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563912955] [2022-11-21 13:48:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:22,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:22,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:22,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:22,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 13:48:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:48:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:22,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563912955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:22,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:48:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258397207] [2022-11-21 13:48:22,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:48:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:48:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:48:22,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-11-21 13:48:22,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 305 transitions, 701 flow. Second operand has 18 states, 18 states have (on average 302.6111111111111) internal successors, (5447), 18 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:22,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:22,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-11-21 13:48:22,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:23,116 INFO L130 PetriNetUnfolder]: 0/394 cut-off events. [2022-11-21 13:48:23,117 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-21 13:48:23,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 394 events. 0/394 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 952 event pairs, 0 based on Foata normal form. 4/398 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-21 13:48:23,118 INFO L137 encePairwiseOnDemand]: 380/386 looper letters, 27 selfloop transitions, 21 changer transitions 0/329 dead transitions. [2022-11-21 13:48:23,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 329 transitions, 905 flow [2022-11-21 13:48:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 13:48:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 13:48:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6352 transitions. [2022-11-21 13:48:23,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7836170737725142 [2022-11-21 13:48:23,131 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6352 transitions. [2022-11-21 13:48:23,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6352 transitions. [2022-11-21 13:48:23,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:23,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6352 transitions. [2022-11-21 13:48:23,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 302.4761904761905) internal successors, (6352), 21 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:23,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:23,179 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:23,179 INFO L175 Difference]: Start difference. First operand has 331 places, 305 transitions, 701 flow. Second operand 21 states and 6352 transitions. [2022-11-21 13:48:23,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 329 transitions, 905 flow [2022-11-21 13:48:23,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 329 transitions, 891 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:23,187 INFO L231 Difference]: Finished difference. Result has 355 places, 318 transitions, 825 flow [2022-11-21 13:48:23,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=825, PETRI_PLACES=355, PETRI_TRANSITIONS=318} [2022-11-21 13:48:23,188 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, 18 predicate places. [2022-11-21 13:48:23,188 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 318 transitions, 825 flow [2022-11-21 13:48:23,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 302.6111111111111) internal successors, (5447), 18 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:23,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:23,189 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:23,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-21 13:48:23,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:23,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash -62656163, now seen corresponding path program 1 times [2022-11-21 13:48:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:23,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408110708] [2022-11-21 13:48:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:23,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:23,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:23,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408110708] [2022-11-21 13:48:23,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408110708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:23,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898494024] [2022-11-21 13:48:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:23,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:23,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:23,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 13:48:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 13:48:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:24,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:24,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898494024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:24,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:24,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-21 13:48:24,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589779501] [2022-11-21 13:48:24,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:24,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:48:24,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:48:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 13:48:24,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-11-21 13:48:24,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 318 transitions, 825 flow. Second operand has 34 states, 34 states have (on average 302.79411764705884) internal successors, (10295), 34 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:24,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:24,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-11-21 13:48:24,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:25,127 INFO L130 PetriNetUnfolder]: 0/364 cut-off events. [2022-11-21 13:48:25,127 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-21 13:48:25,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 364 events. 0/364 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/367 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-21 13:48:25,129 INFO L137 encePairwiseOnDemand]: 381/386 looper letters, 30 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2022-11-21 13:48:25,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 330 transitions, 1021 flow [2022-11-21 13:48:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 13:48:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-21 13:48:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9061 transitions. [2022-11-21 13:48:25,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7824697754749568 [2022-11-21 13:48:25,145 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9061 transitions. [2022-11-21 13:48:25,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9061 transitions. [2022-11-21 13:48:25,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:25,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9061 transitions. [2022-11-21 13:48:25,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 302.03333333333336) internal successors, (9061), 30 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:25,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 386.0) internal successors, (11966), 31 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:25,185 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 386.0) internal successors, (11966), 31 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:25,185 INFO L175 Difference]: Start difference. First operand has 355 places, 318 transitions, 825 flow. Second operand 30 states and 9061 transitions. [2022-11-21 13:48:25,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 330 transitions, 1021 flow [2022-11-21 13:48:25,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 330 transitions, 961 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-21 13:48:25,195 INFO L231 Difference]: Finished difference. Result has 361 places, 314 transitions, 838 flow [2022-11-21 13:48:25,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=838, PETRI_PLACES=361, PETRI_TRANSITIONS=314} [2022-11-21 13:48:25,196 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, 24 predicate places. [2022-11-21 13:48:25,196 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 314 transitions, 838 flow [2022-11-21 13:48:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 302.79411764705884) internal successors, (10295), 34 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:25,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:25,199 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:25,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:25,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:25,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash -235375115, now seen corresponding path program 1 times [2022-11-21 13:48:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076900613] [2022-11-21 13:48:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:25,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:25,468 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:48:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:25,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:48:25,544 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:48:25,544 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:48:25,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:48:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-21 13:48:25,548 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-21 13:48:25,548 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:48:25,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-21 13:48:25,607 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-21 13:48:25,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 366 places, 420 transitions, 1010 flow [2022-11-21 13:48:31,622 INFO L130 PetriNetUnfolder]: 5235/20143 cut-off events. [2022-11-21 13:48:31,622 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-21 13:48:32,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25349 conditions, 20143 events. 5235/20143 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 210484 event pairs, 3084 based on Foata normal form. 0/17969 useless extension candidates. Maximal degree in co-relation 12453. Up to 5120 conditions per place. [2022-11-21 13:48:32,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 420 transitions, 1010 flow [2022-11-21 13:48:32,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 366 places, 420 transitions, 1010 flow [2022-11-21 13:48:32,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:48:32,639 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:48:32,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:48:32,643 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-21 13:48:32,643 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:48:32,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:32,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:32,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash -919706802, now seen corresponding path program 1 times [2022-11-21 13:48:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:32,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698487077] [2022-11-21 13:48:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:32,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698487077] [2022-11-21 13:48:32,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698487077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:32,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:32,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:48:32,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409524435] [2022-11-21 13:48:32,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:32,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:48:32,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:48:32,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:48:32,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 420 [2022-11-21 13:48:32,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 420 transitions, 1010 flow. Second operand has 2 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:32,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:32,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 420 [2022-11-21 13:48:32,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:39,214 INFO L130 PetriNetUnfolder]: 4107/19004 cut-off events. [2022-11-21 13:48:39,214 INFO L131 PetriNetUnfolder]: For 15645/15715 co-relation queries the response was YES. [2022-11-21 13:48:39,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 19004 events. 4107/19004 cut-off events. For 15645/15715 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206566 event pairs, 3084 based on Foata normal form. 32006/49964 useless extension candidates. Maximal degree in co-relation 14150. Up to 5131 conditions per place. [2022-11-21 13:48:39,565 INFO L137 encePairwiseOnDemand]: 355/420 looper letters, 10 selfloop transitions, 0 changer transitions 29/354 dead transitions. [2022-11-21 13:48:39,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 354 transitions, 918 flow [2022-11-21 13:48:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:48:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:48:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 753 transitions. [2022-11-21 13:48:39,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8964285714285715 [2022-11-21 13:48:39,567 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 753 transitions. [2022-11-21 13:48:39,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 753 transitions. [2022-11-21 13:48:39,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:39,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 753 transitions. [2022-11-21 13:48:39,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 376.5) internal successors, (753), 2 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 420.0) internal successors, (1260), 3 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,573 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 420.0) internal successors, (1260), 3 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,573 INFO L175 Difference]: Start difference. First operand has 366 places, 420 transitions, 1010 flow. Second operand 2 states and 753 transitions. [2022-11-21 13:48:39,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 354 transitions, 918 flow [2022-11-21 13:48:39,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 354 transitions, 918 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:39,591 INFO L231 Difference]: Finished difference. Result has 366 places, 325 transitions, 790 flow [2022-11-21 13:48:39,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=790, PETRI_PLACES=366, PETRI_TRANSITIONS=325} [2022-11-21 13:48:39,592 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, 0 predicate places. [2022-11-21 13:48:39,592 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 325 transitions, 790 flow [2022-11-21 13:48:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:39,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:39,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-21 13:48:39,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:39,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1116220307, now seen corresponding path program 1 times [2022-11-21 13:48:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519164253] [2022-11-21 13:48:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:39,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:39,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:39,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519164253] [2022-11-21 13:48:39,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519164253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:48:39,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:48:39,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:48:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7728964] [2022-11-21 13:48:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:48:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:48:39,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:48:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:48:39,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 420 [2022-11-21 13:48:39,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 325 transitions, 790 flow. Second operand has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:39,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 420 [2022-11-21 13:48:39,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:39,769 INFO L130 PetriNetUnfolder]: 0/500 cut-off events. [2022-11-21 13:48:39,769 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-21 13:48:39,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 500 events. 0/500 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1487 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-21 13:48:39,770 INFO L137 encePairwiseOnDemand]: 417/420 looper letters, 19 selfloop transitions, 2 changer transitions 0/329 dead transitions. [2022-11-21 13:48:39,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 329 transitions, 840 flow [2022-11-21 13:48:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:48:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:48:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1003 transitions. [2022-11-21 13:48:39,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.796031746031746 [2022-11-21 13:48:39,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1003 transitions. [2022-11-21 13:48:39,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1003 transitions. [2022-11-21 13:48:39,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:39,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1003 transitions. [2022-11-21 13:48:39,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.3333333333333) internal successors, (1003), 3 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,776 INFO L175 Difference]: Start difference. First operand has 366 places, 325 transitions, 790 flow. Second operand 3 states and 1003 transitions. [2022-11-21 13:48:39,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 329 transitions, 840 flow [2022-11-21 13:48:39,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 329 transitions, 750 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-21 13:48:39,782 INFO L231 Difference]: Finished difference. Result has 350 places, 326 transitions, 712 flow [2022-11-21 13:48:39,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=712, PETRI_PLACES=350, PETRI_TRANSITIONS=326} [2022-11-21 13:48:39,783 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, -16 predicate places. [2022-11-21 13:48:39,783 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 326 transitions, 712 flow [2022-11-21 13:48:39,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:39,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:39,784 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:39,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-21 13:48:39,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2108742908, now seen corresponding path program 1 times [2022-11-21 13:48:39,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:39,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874236996] [2022-11-21 13:48:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:39,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:39,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874236996] [2022-11-21 13:48:39,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874236996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096477978] [2022-11-21 13:48:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:39,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:39,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:39,839 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:39,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 13:48:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:48:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:40,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:40,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096477978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:40,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:40,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:48:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137086253] [2022-11-21 13:48:40,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:48:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:48:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:48:40,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-11-21 13:48:40,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 326 transitions, 712 flow. Second operand has 10 states, 10 states have (on average 328.3) internal successors, (3283), 10 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:40,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:40,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-11-21 13:48:40,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:40,333 INFO L130 PetriNetUnfolder]: 0/480 cut-off events. [2022-11-21 13:48:40,334 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-21 13:48:40,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 480 events. 0/480 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1372 event pairs, 0 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-21 13:48:40,335 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 20 selfloop transitions, 9 changer transitions 0/336 dead transitions. [2022-11-21 13:48:40,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 336 transitions, 792 flow [2022-11-21 13:48:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:48:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:48:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2965 transitions. [2022-11-21 13:48:40,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7843915343915344 [2022-11-21 13:48:40,339 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2965 transitions. [2022-11-21 13:48:40,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2965 transitions. [2022-11-21 13:48:40,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:40,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2965 transitions. [2022-11-21 13:48:40,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 329.44444444444446) internal successors, (2965), 9 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:40,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:40,348 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:40,348 INFO L175 Difference]: Start difference. First operand has 350 places, 326 transitions, 712 flow. Second operand 9 states and 2965 transitions. [2022-11-21 13:48:40,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 336 transitions, 792 flow [2022-11-21 13:48:40,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 336 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:40,357 INFO L231 Difference]: Finished difference. Result has 360 places, 332 transitions, 760 flow [2022-11-21 13:48:40,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=760, PETRI_PLACES=360, PETRI_TRANSITIONS=332} [2022-11-21 13:48:40,359 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, -6 predicate places. [2022-11-21 13:48:40,359 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 332 transitions, 760 flow [2022-11-21 13:48:40,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 328.3) internal successors, (3283), 10 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:40,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:40,360 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:40,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:40,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-21 13:48:40,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1540552887, now seen corresponding path program 1 times [2022-11-21 13:48:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:40,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351893890] [2022-11-21 13:48:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:40,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351893890] [2022-11-21 13:48:40,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351893890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413393793] [2022-11-21 13:48:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:40,698 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:40,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 13:48:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:48:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:40,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413393793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:41,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:41,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:48:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537394222] [2022-11-21 13:48:41,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:48:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:48:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:48:41,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-11-21 13:48:41,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 332 transitions, 760 flow. Second operand has 18 states, 18 states have (on average 328.6111111111111) internal successors, (5915), 18 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:41,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:41,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-11-21 13:48:41,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:41,442 INFO L130 PetriNetUnfolder]: 0/440 cut-off events. [2022-11-21 13:48:41,442 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-21 13:48:41,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 440 events. 0/440 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1116 event pairs, 0 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-21 13:48:41,443 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 28 selfloop transitions, 21 changer transitions 0/356 dead transitions. [2022-11-21 13:48:41,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 356 transitions, 966 flow [2022-11-21 13:48:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 13:48:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 13:48:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6899 transitions. [2022-11-21 13:48:41,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7821995464852608 [2022-11-21 13:48:41,450 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6899 transitions. [2022-11-21 13:48:41,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6899 transitions. [2022-11-21 13:48:41,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:41,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6899 transitions. [2022-11-21 13:48:41,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 328.5238095238095) internal successors, (6899), 21 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:41,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 420.0) internal successors, (9240), 22 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:41,641 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 420.0) internal successors, (9240), 22 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:41,641 INFO L175 Difference]: Start difference. First operand has 360 places, 332 transitions, 760 flow. Second operand 21 states and 6899 transitions. [2022-11-21 13:48:41,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 356 transitions, 966 flow [2022-11-21 13:48:41,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 356 transitions, 952 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 13:48:41,648 INFO L231 Difference]: Finished difference. Result has 384 places, 345 transitions, 884 flow [2022-11-21 13:48:41,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=884, PETRI_PLACES=384, PETRI_TRANSITIONS=345} [2022-11-21 13:48:41,648 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, 18 predicate places. [2022-11-21 13:48:41,649 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 345 transitions, 884 flow [2022-11-21 13:48:41,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 328.6111111111111) internal successors, (5915), 18 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:41,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:41,650 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:41,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-21 13:48:41,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1163509153, now seen corresponding path program 1 times [2022-11-21 13:48:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:41,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229660960] [2022-11-21 13:48:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:42,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:48:42,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229660960] [2022-11-21 13:48:42,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229660960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:48:42,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853061505] [2022-11-21 13:48:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:42,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:48:42,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:48:42,227 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:48:42,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 13:48:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:48:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 13:48:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:48:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:42,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:48:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:48:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853061505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:48:42,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:48:42,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-21 13:48:42,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356818548] [2022-11-21 13:48:42,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:48:42,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:48:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:48:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:48:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 13:48:42,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-11-21 13:48:42,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 345 transitions, 884 flow. Second operand has 34 states, 34 states have (on average 328.79411764705884) internal successors, (11179), 34 states have internal predecessors, (11179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:42,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:48:42,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-11-21 13:48:42,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:48:43,494 INFO L130 PetriNetUnfolder]: 0/400 cut-off events. [2022-11-21 13:48:43,494 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-21 13:48:43,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 400 events. 0/400 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-21 13:48:43,496 INFO L137 encePairwiseOnDemand]: 415/420 looper letters, 33 selfloop transitions, 31 changer transitions 0/362 dead transitions. [2022-11-21 13:48:43,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 362 transitions, 1126 flow [2022-11-21 13:48:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 13:48:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-21 13:48:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10826 transitions. [2022-11-21 13:48:43,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7810966810966811 [2022-11-21 13:48:43,507 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10826 transitions. [2022-11-21 13:48:43,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10826 transitions. [2022-11-21 13:48:43,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:48:43,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10826 transitions. [2022-11-21 13:48:43,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 328.06060606060606) internal successors, (10826), 33 states have internal predecessors, (10826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:43,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 420.0) internal successors, (14280), 34 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:43,537 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 420.0) internal successors, (14280), 34 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:43,538 INFO L175 Difference]: Start difference. First operand has 384 places, 345 transitions, 884 flow. Second operand 33 states and 10826 transitions. [2022-11-21 13:48:43,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 362 transitions, 1126 flow [2022-11-21 13:48:43,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 362 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-21 13:48:43,546 INFO L231 Difference]: Finished difference. Result has 393 places, 344 transitions, 921 flow [2022-11-21 13:48:43,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=393, PETRI_TRANSITIONS=344} [2022-11-21 13:48:43,550 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, 27 predicate places. [2022-11-21 13:48:43,550 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 344 transitions, 921 flow [2022-11-21 13:48:43,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 328.79411764705884) internal successors, (11179), 34 states have internal predecessors, (11179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:48:43,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:48:43,553 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:48:43,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 13:48:43,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddfd067b-3322-4c40-89a8-b964180aa291/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-21 13:48:43,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:48:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:48:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 954621519, now seen corresponding path program 1 times [2022-11-21 13:48:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:48:43,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028528397] [2022-11-21 13:48:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:48:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:48:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:43,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:48:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:48:43,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:48:43,825 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:48:43,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-21 13:48:43,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 13:48:43,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-21 13:48:43,825 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-21 13:48:43,826 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 13:48:43,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-21 13:48:43,870 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-11-21 13:48:43,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 454 transitions, 1106 flow [2022-11-21 13:48:57,414 INFO L130 PetriNetUnfolder]: 11390/40686 cut-off events. [2022-11-21 13:48:57,415 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-11-21 13:48:59,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52050 conditions, 40686 events. 11390/40686 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 476953 event pairs, 7181 based on Foata normal form. 0/36452 useless extension candidates. Maximal degree in co-relation 25327. Up to 11264 conditions per place. [2022-11-21 13:48:59,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 454 transitions, 1106 flow [2022-11-21 13:49:00,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 454 transitions, 1106 flow [2022-11-21 13:49:00,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:49:00,200 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;@7a713fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:49:00,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 13:49:00,207 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-21 13:49:00,208 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:49:00,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:00,208 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:00,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:49:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1501815956, now seen corresponding path program 1 times [2022-11-21 13:49:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:00,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448785036] [2022-11-21 13:49:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:00,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:00,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448785036] [2022-11-21 13:49:00,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448785036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:00,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:00,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:49:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304564357] [2022-11-21 13:49:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:00,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:49:00,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:49:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:49:00,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 454 [2022-11-21 13:49:00,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 454 transitions, 1106 flow. Second operand has 2 states, 2 states have (on average 360.5) internal successors, (721), 2 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:00,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:00,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 454 [2022-11-21 13:49:00,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand