./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8 --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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- 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-e04fb08 [2022-11-16 11:26:12,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:26:12,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:26:12,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:26:12,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:26:12,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:26:12,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:26:12,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:26:12,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:26:12,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:26:12,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:26:12,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:26:12,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:26:12,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:26:12,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:26:12,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:26:12,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:26:12,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:26:12,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:26:12,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:26:12,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:26:12,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:26:12,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:26:12,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:26:12,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:26:12,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:26:12,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:26:12,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:26:12,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:26:12,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:26:12,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:26:12,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:26:12,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:26:12,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:26:12,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:26:12,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:26:12,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:26:12,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:26:12,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:26:12,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:26:12,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:26:12,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:26:12,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:26:12,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:26:12,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:26:12,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:26:12,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:26:12,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:26:12,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:26:12,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:26:12,472 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:26:12,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:26:12,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:26:12,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:26:12,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:26:12,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:26:12,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:26:12,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:26:12,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:26:12,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:26:12,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:26:12,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:26:12,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:26:12,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:26:12,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:26:12,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:26:12,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:26:12,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:26:12,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:26:12,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:26:12,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:26:12,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:26:12,478 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:26:12,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:26:12,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:26:12,479 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_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-11-16 11:26:12,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:26:12,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:26:12,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:26:12,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:26:12,804 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:26:12,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-16 11:26:12,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/data/a019bf207/260b544101464350b9e0fa445943f130/FLAG4be155c83 [2022-11-16 11:26:13,422 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:26:13,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-16 11:26:13,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/data/a019bf207/260b544101464350b9e0fa445943f130/FLAG4be155c83 [2022-11-16 11:26:13,759 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/data/a019bf207/260b544101464350b9e0fa445943f130 [2022-11-16 11:26:13,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:26:13,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:26:13,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:26:13,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:26:13,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:26:13,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:26:13" (1/1) ... [2022-11-16 11:26:13,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5159c823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:13, skipping insertion in model container [2022-11-16 11:26:13,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:26:13" (1/1) ... [2022-11-16 11:26:13,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:26:13,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:26:14,052 WARN L229 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_3405bf39-e8f8-492f-b514-a94f6c61febf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-16 11:26:14,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:26:14,084 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:26:14,130 WARN L229 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_3405bf39-e8f8-492f-b514-a94f6c61febf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-16 11:26:14,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:26:14,149 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:26:14,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14 WrapperNode [2022-11-16 11:26:14,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:26:14,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:26:14,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:26:14,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:26:14,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,204 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2022-11-16 11:26:14,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:26:14,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:26:14,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:26:14,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:26:14,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:26:14,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:26:14,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:26:14,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:26:14,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (1/1) ... [2022-11-16 11:26:14,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:26:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:14,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:26:14,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:26:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:26:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:26:14,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:26:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:26:14,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:26:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:26:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:26:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:26:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:26:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:26:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:26:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:26:14,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:26:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:26:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:26:14,347 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:26:14,456 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:26:14,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:26:14,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:26:15,049 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:26:15,049 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:26:15,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:26:15 BoogieIcfgContainer [2022-11-16 11:26:15,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:26:15,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:26:15,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:26:15,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:26:15,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:26:13" (1/3) ... [2022-11-16 11:26:15,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f192c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:26:15, skipping insertion in model container [2022-11-16 11:26:15,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:14" (2/3) ... [2022-11-16 11:26:15,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f192c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:26:15, skipping insertion in model container [2022-11-16 11:26:15,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:26:15" (3/3) ... [2022-11-16 11:26:15,072 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-11-16 11:26:15,080 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:26:15,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:26:15,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:26:15,091 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:26:15,234 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:26:15,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 178 transitions, 372 flow [2022-11-16 11:26:15,411 INFO L130 PetriNetUnfolder]: 13/176 cut-off events. [2022-11-16 11:26:15,411 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:26:15,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 13/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2022-11-16 11:26:15,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 178 transitions, 372 flow [2022-11-16 11:26:15,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 167 transitions, 346 flow [2022-11-16 11:26:15,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:26:15,453 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;@3b9bab5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:26:15,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:26:15,503 INFO L130 PetriNetUnfolder]: 13/166 cut-off events. [2022-11-16 11:26:15,503 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:26:15,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:15,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:15,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash -202254547, now seen corresponding path program 1 times [2022-11-16 11:26:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214467432] [2022-11-16 11:26:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:15,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214467432] [2022-11-16 11:26:15,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214467432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:15,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:15,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:26:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153839282] [2022-11-16 11:26:15,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:15,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:26:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:26:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:26:15,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 178 [2022-11-16 11:26:15,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 167 transitions, 346 flow. Second operand has 2 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:15,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:15,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 178 [2022-11-16 11:26:15,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:16,064 INFO L130 PetriNetUnfolder]: 17/189 cut-off events. [2022-11-16 11:26:16,064 INFO L131 PetriNetUnfolder]: For 17/20 co-relation queries the response was YES. [2022-11-16 11:26:16,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 189 events. 17/189 cut-off events. For 17/20 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 8 based on Foata normal form. 15/191 useless extension candidates. Maximal degree in co-relation 137. Up to 25 conditions per place. [2022-11-16 11:26:16,070 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 8 selfloop transitions, 0 changer transitions 5/158 dead transitions. [2022-11-16 11:26:16,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 158 transitions, 344 flow [2022-11-16 11:26:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:26:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:26:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2022-11-16 11:26:16,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9466292134831461 [2022-11-16 11:26:16,095 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2022-11-16 11:26:16,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2022-11-16 11:26:16,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:16,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2022-11-16 11:26:16,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:16,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:16,116 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:16,118 INFO L175 Difference]: Start difference. First operand has 161 places, 167 transitions, 346 flow. Second operand 2 states and 337 transitions. [2022-11-16 11:26:16,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 158 transitions, 344 flow [2022-11-16 11:26:16,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 158 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:26:16,132 INFO L231 Difference]: Finished difference. Result has 158 places, 153 transitions, 310 flow [2022-11-16 11:26:16,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, 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=310, PETRI_PLACES=158, PETRI_TRANSITIONS=153} [2022-11-16 11:26:16,141 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, -3 predicate places. [2022-11-16 11:26:16,141 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 153 transitions, 310 flow [2022-11-16 11:26:16,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:16,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:16,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:26:16,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash 5666051, now seen corresponding path program 1 times [2022-11-16 11:26:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:16,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632717348] [2022-11-16 11:26:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:16,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632717348] [2022-11-16 11:26:16,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632717348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:16,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:16,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:26:16,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559120971] [2022-11-16 11:26:16,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:16,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:26:16,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:16,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:26:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:16,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 178 [2022-11-16 11:26:16,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 153 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:16,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:16,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 178 [2022-11-16 11:26:16,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:17,199 INFO L130 PetriNetUnfolder]: 112/418 cut-off events. [2022-11-16 11:26:17,199 INFO L131 PetriNetUnfolder]: For 20/33 co-relation queries the response was YES. [2022-11-16 11:26:17,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 418 events. 112/418 cut-off events. For 20/33 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1480 event pairs, 33 based on Foata normal form. 3/374 useless extension candidates. Maximal degree in co-relation 673. Up to 120 conditions per place. [2022-11-16 11:26:17,206 INFO L137 encePairwiseOnDemand]: 171/178 looper letters, 59 selfloop transitions, 5 changer transitions 4/183 dead transitions. [2022-11-16 11:26:17,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 511 flow [2022-11-16 11:26:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:26:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:26:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 819 transitions. [2022-11-16 11:26:17,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7668539325842697 [2022-11-16 11:26:17,212 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 819 transitions. [2022-11-16 11:26:17,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 819 transitions. [2022-11-16 11:26:17,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:17,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 819 transitions. [2022-11-16 11:26:17,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.5) internal successors, (819), 6 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,221 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,221 INFO L175 Difference]: Start difference. First operand has 158 places, 153 transitions, 310 flow. Second operand 6 states and 819 transitions. [2022-11-16 11:26:17,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 511 flow [2022-11-16 11:26:17,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:26:17,229 INFO L231 Difference]: Finished difference. Result has 161 places, 156 transitions, 339 flow [2022-11-16 11:26:17,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=161, PETRI_TRANSITIONS=156} [2022-11-16 11:26:17,250 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-11-16 11:26:17,250 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 156 transitions, 339 flow [2022-11-16 11:26:17,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.66666666666666) internal successors, (778), 6 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:17,251 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:26:17,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1156830495, now seen corresponding path program 1 times [2022-11-16 11:26:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:17,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235211948] [2022-11-16 11:26:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:17,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:17,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235211948] [2022-11-16 11:26:17,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235211948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:17,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:17,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:26:17,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680001457] [2022-11-16 11:26:17,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:17,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:26:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:26:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:26:17,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-11-16 11:26:17,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 156 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:17,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-11-16 11:26:17,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:17,760 INFO L130 PetriNetUnfolder]: 109/423 cut-off events. [2022-11-16 11:26:17,760 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-16 11:26:17,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 423 events. 109/423 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1595 event pairs, 48 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 706. Up to 117 conditions per place. [2022-11-16 11:26:17,763 INFO L137 encePairwiseOnDemand]: 168/178 looper letters, 37 selfloop transitions, 11 changer transitions 4/184 dead transitions. [2022-11-16 11:26:17,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 184 transitions, 515 flow [2022-11-16 11:26:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:26:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:26:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2022-11-16 11:26:17,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8865168539325843 [2022-11-16 11:26:17,767 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2022-11-16 11:26:17,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2022-11-16 11:26:17,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:17,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2022-11-16 11:26:17,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,774 INFO L175 Difference]: Start difference. First operand has 161 places, 156 transitions, 339 flow. Second operand 5 states and 789 transitions. [2022-11-16 11:26:17,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 184 transitions, 515 flow [2022-11-16 11:26:17,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 184 transitions, 511 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 11:26:17,783 INFO L231 Difference]: Finished difference. Result has 163 places, 160 transitions, 392 flow [2022-11-16 11:26:17,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=163, PETRI_TRANSITIONS=160} [2022-11-16 11:26:17,786 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 2 predicate places. [2022-11-16 11:26:17,786 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 160 transitions, 392 flow [2022-11-16 11:26:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:17,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:17,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:17,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:26:17,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1006851169, now seen corresponding path program 2 times [2022-11-16 11:26:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603329708] [2022-11-16 11:26:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603329708] [2022-11-16 11:26:18,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603329708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:18,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:18,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:26:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035029026] [2022-11-16 11:26:18,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:18,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:26:18,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:26:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:18,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-11-16 11:26:18,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 160 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:18,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-11-16 11:26:18,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:18,185 INFO L130 PetriNetUnfolder]: 91/366 cut-off events. [2022-11-16 11:26:18,185 INFO L131 PetriNetUnfolder]: For 116/126 co-relation queries the response was YES. [2022-11-16 11:26:18,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 366 events. 91/366 cut-off events. For 116/126 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1173 event pairs, 28 based on Foata normal form. 12/370 useless extension candidates. Maximal degree in co-relation 682. Up to 116 conditions per place. [2022-11-16 11:26:18,188 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 33 selfloop transitions, 7 changer transitions 6/178 dead transitions. [2022-11-16 11:26:18,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 178 transitions, 532 flow [2022-11-16 11:26:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:26:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:26:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 929 transitions. [2022-11-16 11:26:18,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698501872659176 [2022-11-16 11:26:18,192 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 929 transitions. [2022-11-16 11:26:18,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 929 transitions. [2022-11-16 11:26:18,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:18,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 929 transitions. [2022-11-16 11:26:18,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.83333333333334) internal successors, (929), 6 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,199 INFO L175 Difference]: Start difference. First operand has 163 places, 160 transitions, 392 flow. Second operand 6 states and 929 transitions. [2022-11-16 11:26:18,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 178 transitions, 532 flow [2022-11-16 11:26:18,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:26:18,205 INFO L231 Difference]: Finished difference. Result has 166 places, 158 transitions, 385 flow [2022-11-16 11:26:18,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2022-11-16 11:26:18,206 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 5 predicate places. [2022-11-16 11:26:18,206 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 385 flow [2022-11-16 11:26:18,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:18,207 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:18,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:26:18,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:18,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1747226409, now seen corresponding path program 1 times [2022-11-16 11:26:18,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:18,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768771299] [2022-11-16 11:26:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:18,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:18,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:18,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768771299] [2022-11-16 11:26:18,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768771299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:18,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:18,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:26:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724326394] [2022-11-16 11:26:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:18,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:26:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:26:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:18,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2022-11-16 11:26:18,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 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) [2022-11-16 11:26:18,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:18,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2022-11-16 11:26:18,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:18,567 INFO L130 PetriNetUnfolder]: 31/275 cut-off events. [2022-11-16 11:26:18,567 INFO L131 PetriNetUnfolder]: For 53/59 co-relation queries the response was YES. [2022-11-16 11:26:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 275 events. 31/275 cut-off events. For 53/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 568 event pairs, 14 based on Foata normal form. 5/271 useless extension candidates. Maximal degree in co-relation 462. Up to 56 conditions per place. [2022-11-16 11:26:18,569 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 35 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-11-16 11:26:18,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 493 flow [2022-11-16 11:26:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:26:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:26:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 982 transitions. [2022-11-16 11:26:18,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7881219903691814 [2022-11-16 11:26:18,573 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 982 transitions. [2022-11-16 11:26:18,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 982 transitions. [2022-11-16 11:26:18,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:18,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 982 transitions. [2022-11-16 11:26:18,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.28571428571428) internal successors, (982), 7 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,579 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:18,579 INFO L175 Difference]: Start difference. First operand has 166 places, 158 transitions, 385 flow. Second operand 7 states and 982 transitions. [2022-11-16 11:26:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 493 flow [2022-11-16 11:26:18,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 473 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 11:26:18,586 INFO L231 Difference]: Finished difference. Result has 170 places, 159 transitions, 389 flow [2022-11-16 11:26:18,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=170, PETRI_TRANSITIONS=159} [2022-11-16 11:26:18,589 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 9 predicate places. [2022-11-16 11:26:18,589 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 159 transitions, 389 flow [2022-11-16 11:26:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 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) [2022-11-16 11:26:18,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:18,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:26:18,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1329324248, now seen corresponding path program 1 times [2022-11-16 11:26:18,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:18,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504024877] [2022-11-16 11:26:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504024877] [2022-11-16 11:26:18,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504024877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168959973] [2022-11-16 11:26:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:18,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:18,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:18,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:26:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:26:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:19,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:19,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168959973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:19,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:19,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-16 11:26:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197353656] [2022-11-16 11:26:19,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:26:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:26:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:26:19,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 178 [2022-11-16 11:26:19,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 159 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:19,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:19,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 178 [2022-11-16 11:26:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:20,036 INFO L130 PetriNetUnfolder]: 110/441 cut-off events. [2022-11-16 11:26:20,036 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-16 11:26:20,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 441 events. 110/441 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1471 event pairs, 20 based on Foata normal form. 7/444 useless extension candidates. Maximal degree in co-relation 861. Up to 70 conditions per place. [2022-11-16 11:26:20,040 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 58 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2022-11-16 11:26:20,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 713 flow [2022-11-16 11:26:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:26:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:26:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1843 transitions. [2022-11-16 11:26:20,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8628277153558053 [2022-11-16 11:26:20,045 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1843 transitions. [2022-11-16 11:26:20,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1843 transitions. [2022-11-16 11:26:20,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:20,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1843 transitions. [2022-11-16 11:26:20,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,055 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,055 INFO L175 Difference]: Start difference. First operand has 170 places, 159 transitions, 389 flow. Second operand 12 states and 1843 transitions. [2022-11-16 11:26:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 713 flow [2022-11-16 11:26:20,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 210 transitions, 703 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:26:20,063 INFO L231 Difference]: Finished difference. Result has 181 places, 170 transitions, 498 flow [2022-11-16 11:26:20,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2022-11-16 11:26:20,066 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 20 predicate places. [2022-11-16 11:26:20,066 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 498 flow [2022-11-16 11:26:20,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:20,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:20,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:20,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:20,278 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash -878960660, now seen corresponding path program 1 times [2022-11-16 11:26:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:20,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575392218] [2022-11-16 11:26:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:20,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:20,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:20,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575392218] [2022-11-16 11:26:20,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575392218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:20,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:20,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:26:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257540181] [2022-11-16 11:26:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:20,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:26:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:26:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:20,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 178 [2022-11-16 11:26:20,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:20,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 178 [2022-11-16 11:26:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:20,675 INFO L130 PetriNetUnfolder]: 46/388 cut-off events. [2022-11-16 11:26:20,676 INFO L131 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2022-11-16 11:26:20,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 388 events. 46/388 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1006 event pairs, 21 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 737. Up to 90 conditions per place. [2022-11-16 11:26:20,678 INFO L137 encePairwiseOnDemand]: 167/178 looper letters, 40 selfloop transitions, 8 changer transitions 17/191 dead transitions. [2022-11-16 11:26:20,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 191 transitions, 682 flow [2022-11-16 11:26:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:26:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:26:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1262 transitions. [2022-11-16 11:26:20,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.787765293383271 [2022-11-16 11:26:20,682 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1262 transitions. [2022-11-16 11:26:20,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1262 transitions. [2022-11-16 11:26:20,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:20,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1262 transitions. [2022-11-16 11:26:20,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.22222222222223) internal successors, (1262), 9 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,690 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,690 INFO L175 Difference]: Start difference. First operand has 181 places, 170 transitions, 498 flow. Second operand 9 states and 1262 transitions. [2022-11-16 11:26:20,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 191 transitions, 682 flow [2022-11-16 11:26:20,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 191 transitions, 645 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-11-16 11:26:20,696 INFO L231 Difference]: Finished difference. Result has 187 places, 171 transitions, 491 flow [2022-11-16 11:26:20,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=491, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-11-16 11:26:20,697 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 26 predicate places. [2022-11-16 11:26:20,697 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 491 flow [2022-11-16 11:26:20,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:20,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:20,698 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:20,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:26:20,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1138907430, now seen corresponding path program 1 times [2022-11-16 11:26:20,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:20,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729879267] [2022-11-16 11:26:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:20,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:26,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:26,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729879267] [2022-11-16 11:26:26,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729879267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:26,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605735269] [2022-11-16 11:26:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:26,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:26,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:26,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:26,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:26:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:26,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 11:26:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:30,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:26:30,863 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 11:26:30,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2022-11-16 11:26:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:31,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:32,572 INFO L321 Elim1Store]: treesize reduction 30, result has 87.2 percent of original size [2022-11-16 11:26:32,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 236 [2022-11-16 11:26:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:41,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605735269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:41,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:41,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 31] total 103 [2022-11-16 11:26:41,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510643043] [2022-11-16 11:26:41,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:41,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-16 11:26:41,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-16 11:26:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1045, Invalid=9461, Unknown=0, NotChecked=0, Total=10506 [2022-11-16 11:26:41,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 178 [2022-11-16 11:26:41,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 491 flow. Second operand has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:41,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:41,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 178 [2022-11-16 11:26:41,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:27:07,538 INFO L130 PetriNetUnfolder]: 1364/2913 cut-off events. [2022-11-16 11:27:07,539 INFO L131 PetriNetUnfolder]: For 1999/1999 co-relation queries the response was YES. [2022-11-16 11:27:07,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7518 conditions, 2913 events. 1364/2913 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19573 event pairs, 34 based on Foata normal form. 31/2938 useless extension candidates. Maximal degree in co-relation 7501. Up to 433 conditions per place. [2022-11-16 11:27:07,562 INFO L137 encePairwiseOnDemand]: 120/178 looper letters, 383 selfloop transitions, 394 changer transitions 36/867 dead transitions. [2022-11-16 11:27:07,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 867 transitions, 4594 flow [2022-11-16 11:27:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-16 11:27:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-11-16 11:27:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 11548 transitions. [2022-11-16 11:27:07,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3861690743713216 [2022-11-16 11:27:07,599 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 11548 transitions. [2022-11-16 11:27:07,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 11548 transitions. [2022-11-16 11:27:07,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:27:07,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 11548 transitions. [2022-11-16 11:27:07,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 68.73809523809524) internal successors, (11548), 168 states have internal predecessors, (11548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:07,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 178.0) internal successors, (30082), 169 states have internal predecessors, (30082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:07,702 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 178.0) internal successors, (30082), 169 states have internal predecessors, (30082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:07,702 INFO L175 Difference]: Start difference. First operand has 187 places, 171 transitions, 491 flow. Second operand 168 states and 11548 transitions. [2022-11-16 11:27:07,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 867 transitions, 4594 flow [2022-11-16 11:27:07,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 867 transitions, 4373 flow, removed 83 selfloop flow, removed 7 redundant places. [2022-11-16 11:27:07,739 INFO L231 Difference]: Finished difference. Result has 410 places, 557 transitions, 3329 flow [2022-11-16 11:27:07,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=3329, PETRI_PLACES=410, PETRI_TRANSITIONS=557} [2022-11-16 11:27:07,742 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 249 predicate places. [2022-11-16 11:27:07,743 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 557 transitions, 3329 flow [2022-11-16 11:27:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 66.63106796116504) internal successors, (6863), 103 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:07,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:27:07,745 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:07,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:07,952 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:27:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:07,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1827818492, now seen corresponding path program 2 times [2022-11-16 11:27:07,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:27:07,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432160232] [2022-11-16 11:27:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:07,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:27:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:14,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:27:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432160232] [2022-11-16 11:27:14,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432160232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:27:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336182971] [2022-11-16 11:27:14,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:14,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:27:14,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:27:14,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:27:15,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:27:15,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:15,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-16 11:27:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:16,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:27:16,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:27:18,184 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:27:18,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:27:18,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:27:19,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:27:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:20,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-16 11:27:21,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 16 [2022-11-16 11:27:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:42,249 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 11:27:42,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 112 [2022-11-16 11:27:42,376 INFO L321 Elim1Store]: treesize reduction 65, result has 60.1 percent of original size [2022-11-16 11:27:42,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 277 treesize of output 334 [2022-11-16 11:27:42,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:27:42,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 199 [2022-11-16 11:27:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:42,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:27:42,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 153 [2022-11-16 11:27:45,734 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 11:27:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 112 [2022-11-16 11:27:45,864 INFO L321 Elim1Store]: treesize reduction 69, result has 57.7 percent of original size [2022-11-16 11:27:45,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 277 treesize of output 330 [2022-11-16 11:27:45,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:27:45,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 199 [2022-11-16 11:27:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:45,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:27:45,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 153 [2022-11-16 11:27:51,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:27:51,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2022-11-16 11:27:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:54,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336182971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:54,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:27:54,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 125 [2022-11-16 11:27:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980846626] [2022-11-16 11:27:54,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-11-16 11:27:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:27:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-11-16 11:27:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=14582, Unknown=25, NotChecked=0, Total=15500 [2022-11-16 11:27:54,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 178 [2022-11-16 11:27:54,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 557 transitions, 3329 flow. Second operand has 125 states, 125 states have (on average 56.256) internal successors, (7032), 125 states have internal predecessors, (7032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:54,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:27:54,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 178 [2022-11-16 11:27:54,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:29:31,105 INFO L130 PetriNetUnfolder]: 2516/5270 cut-off events. [2022-11-16 11:29:31,105 INFO L131 PetriNetUnfolder]: For 23939/23986 co-relation queries the response was YES. [2022-11-16 11:29:31,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22820 conditions, 5270 events. 2516/5270 cut-off events. For 23939/23986 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41324 event pairs, 105 based on Foata normal form. 23/5281 useless extension candidates. Maximal degree in co-relation 22741. Up to 1003 conditions per place. [2022-11-16 11:29:31,167 INFO L137 encePairwiseOnDemand]: 116/178 looper letters, 548 selfloop transitions, 899 changer transitions 16/1511 dead transitions. [2022-11-16 11:29:31,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1511 transitions, 13299 flow [2022-11-16 11:29:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-16 11:29:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2022-11-16 11:29:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 13257 transitions. [2022-11-16 11:29:31,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32665582495564754 [2022-11-16 11:29:31,191 INFO L72 ComplementDD]: Start complementDD. Operand 228 states and 13257 transitions. [2022-11-16 11:29:31,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 228 states and 13257 transitions. [2022-11-16 11:29:31,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:29:31,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 228 states and 13257 transitions. [2022-11-16 11:29:31,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 229 states, 228 states have (on average 58.14473684210526) internal successors, (13257), 228 states have internal predecessors, (13257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:31,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 229 states, 229 states have (on average 178.0) internal successors, (40762), 229 states have internal predecessors, (40762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:31,282 INFO L81 ComplementDD]: Finished complementDD. Result has 229 states, 229 states have (on average 178.0) internal successors, (40762), 229 states have internal predecessors, (40762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:31,283 INFO L175 Difference]: Start difference. First operand has 410 places, 557 transitions, 3329 flow. Second operand 228 states and 13257 transitions. [2022-11-16 11:29:31,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1511 transitions, 13299 flow [2022-11-16 11:29:31,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1511 transitions, 11720 flow, removed 593 selfloop flow, removed 32 redundant places. [2022-11-16 11:29:31,631 INFO L231 Difference]: Finished difference. Result has 640 places, 1158 transitions, 8782 flow [2022-11-16 11:29:31,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=228, PETRI_FLOW=8782, PETRI_PLACES=640, PETRI_TRANSITIONS=1158} [2022-11-16 11:29:31,633 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 479 predicate places. [2022-11-16 11:29:31,633 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 1158 transitions, 8782 flow [2022-11-16 11:29:31,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 56.256) internal successors, (7032), 125 states have internal predecessors, (7032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:31,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:29:31,635 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:31,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:29:31,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:29:31,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:29:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:31,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1384668846, now seen corresponding path program 3 times [2022-11-16 11:29:31,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917202749] [2022-11-16 11:29:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:31,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:37,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917202749] [2022-11-16 11:29:37,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917202749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:29:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541493890] [2022-11-16 11:29:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:29:37,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:37,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:37,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:29:38,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:29:38,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 11:29:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:39,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:29:39,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:29:42,021 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:29:42,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:29:42,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:29:44,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:29:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:45,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-16 11:29:45,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 16 [2022-11-16 11:29:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:46,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:08,203 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 11:30:08,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 214 treesize of output 112 [2022-11-16 11:30:08,406 INFO L321 Elim1Store]: treesize reduction 65, result has 60.1 percent of original size [2022-11-16 11:30:08,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 523 treesize of output 556 [2022-11-16 11:30:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:08,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:08,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 373 treesize of output 375 [2022-11-16 11:30:08,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:08,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 377 treesize of output 349 [2022-11-16 11:30:13,830 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 11:30:13,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 126 [2022-11-16 11:30:14,058 INFO L321 Elim1Store]: treesize reduction 69, result has 57.7 percent of original size [2022-11-16 11:30:14,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1087 treesize of output 1020 [2022-11-16 11:30:14,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:14,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 881 treesize of output 709 [2022-11-16 11:30:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:14,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:14,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 668 treesize of output 598 [2022-11-16 11:30:21,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 61 [2022-11-16 11:30:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:24,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541493890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:24,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:30:24,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 44, 44] total 120 [2022-11-16 11:30:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746172577] [2022-11-16 11:30:24,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-11-16 11:30:24,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-11-16 11:30:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=13117, Unknown=33, NotChecked=0, Total=14280 [2022-11-16 11:30:24,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 178 [2022-11-16 11:30:24,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1158 transitions, 8782 flow. Second operand has 120 states, 120 states have (on average 56.35) internal successors, (6762), 120 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:24,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:24,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 178 [2022-11-16 11:30:24,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:07,916 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 177 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:31:39,559 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 136 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:31:49,041 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 225 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:32:16,837 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 117 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:33:36,746 INFO L130 PetriNetUnfolder]: 4488/9106 cut-off events. [2022-11-16 11:33:36,746 INFO L131 PetriNetUnfolder]: For 63452/63533 co-relation queries the response was YES. [2022-11-16 11:33:36,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48677 conditions, 9106 events. 4488/9106 cut-off events. For 63452/63533 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 78815 event pairs, 131 based on Foata normal form. 109/9193 useless extension candidates. Maximal degree in co-relation 48568. Up to 1792 conditions per place. [2022-11-16 11:33:36,930 INFO L137 encePairwiseOnDemand]: 116/178 looper letters, 774 selfloop transitions, 1531 changer transitions 11/2364 dead transitions. [2022-11-16 11:33:36,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 2364 transitions, 24743 flow [2022-11-16 11:33:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-11-16 11:33:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2022-11-16 11:33:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 13208 transitions. [2022-11-16 11:33:36,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32832852739385504 [2022-11-16 11:33:36,951 INFO L72 ComplementDD]: Start complementDD. Operand 226 states and 13208 transitions. [2022-11-16 11:33:36,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 226 states and 13208 transitions. [2022-11-16 11:33:36,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:33:36,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 226 states and 13208 transitions. [2022-11-16 11:33:36,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 227 states, 226 states have (on average 58.442477876106196) internal successors, (13208), 226 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:37,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 227 states, 227 states have (on average 178.0) internal successors, (40406), 227 states have internal predecessors, (40406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:37,019 INFO L81 ComplementDD]: Finished complementDD. Result has 227 states, 227 states have (on average 178.0) internal successors, (40406), 227 states have internal predecessors, (40406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:37,020 INFO L175 Difference]: Start difference. First operand has 640 places, 1158 transitions, 8782 flow. Second operand 226 states and 13208 transitions. [2022-11-16 11:33:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 2364 transitions, 24743 flow [2022-11-16 11:33:37,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 2364 transitions, 23527 flow, removed 522 selfloop flow, removed 63 redundant places. [2022-11-16 11:33:37,864 INFO L231 Difference]: Finished difference. Result has 859 places, 1884 transitions, 18773 flow [2022-11-16 11:33:37,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=226, PETRI_FLOW=18773, PETRI_PLACES=859, PETRI_TRANSITIONS=1884} [2022-11-16 11:33:37,865 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 698 predicate places. [2022-11-16 11:33:37,866 INFO L495 AbstractCegarLoop]: Abstraction has has 859 places, 1884 transitions, 18773 flow [2022-11-16 11:33:37,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 56.35) internal successors, (6762), 120 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:37,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:33:37,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:37,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:33:38,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:33:38,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:33:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash -587231142, now seen corresponding path program 4 times [2022-11-16 11:33:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:33:38,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759530195] [2022-11-16 11:33:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:33:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:45,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:33:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759530195] [2022-11-16 11:33:45,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759530195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:33:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385439120] [2022-11-16 11:33:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:33:45,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:33:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:33:45,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:33:45,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:33:45,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:33:45,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:33:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 11:33:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:50,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-16 11:33:50,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:33:50,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2022-11-16 11:33:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:51,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:54,699 INFO L321 Elim1Store]: treesize reduction 30, result has 87.2 percent of original size [2022-11-16 11:33:54,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 204 treesize of output 352 [2022-11-16 11:33:54,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:33:54,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 170 [2022-11-16 11:33:54,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:33:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 152 [2022-11-16 11:34:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:33,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385439120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:33,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:34:33,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 38, 38] total 109 [2022-11-16 11:34:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150905215] [2022-11-16 11:34:33,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:33,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-16 11:34:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:33,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-16 11:34:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=10994, Unknown=1, NotChecked=0, Total=11772 [2022-11-16 11:34:33,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 178 [2022-11-16 11:34:33,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 1884 transitions, 18773 flow. Second operand has 109 states, 109 states have (on average 61.54128440366973) internal successors, (6708), 109 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:33,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:34:33,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 178 [2022-11-16 11:34:33,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:34:56,582 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (* c_~q2_front~0 4)) (.cse13 (* c_~q1_back~0 4)) (.cse14 (* c_~q1_front~0 4))) (let ((.cse2 (< 0 c_~q2_back~0)) (.cse3 (let ((.cse15 (< c_~j~0 c_~i~0))) (and (or (= (* c_~q2_back~0 4) .cse12) .cse15) (= .cse13 .cse14) (or (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t2~0#1.base| 1)) .cse15) (< c_~j~0 (+ c_~i~0 1))))) (.cse4 (not (<= 0 c_~q2_back~0))) (.cse0 (not (<= 0 c_~q1_back~0))) (.cse1 (not (< c_~q1_back~0 c_~n1~0)))) (and (= c_~i~0 0) (or .cse0 .cse1 .cse2 .cse3 .cse4) (or .cse0 .cse2 (< 0 c_~q1_back~0) .cse3 .cse4) (<= c_~q1_back~0 c_~q1_front~0) (<= c_~q1_front~0 c_~q1_back~0) (or (let ((.cse6 (+ .cse14 c_~q1~0.offset)) (.cse7 (+ .cse13 c_~q1~0.offset)) (.cse9 (+ c_~q2~0.offset .cse12))) (and (forall ((v_ArrVal_245 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_245))) (or (forall ((~q1~0.base Int)) (let ((.cse5 (select .cse8 ~q1~0.base))) (or (< (select .cse5 .cse6) c_~N~0) (not (= (select .cse5 .cse7) c_~j~0))))) (< (+ (select (select .cse8 c_~q2~0.base) .cse9) 1) c_~N~0)))) (forall ((v_ArrVal_245 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_245))) (or (forall ((~q1~0.base Int)) (let ((.cse10 (select .cse11 ~q1~0.base))) (or (< (+ (select .cse10 .cse6) 1) c_~N~0) (not (= (select .cse10 .cse7) c_~j~0))))) (< (select (select .cse11 c_~q2~0.base) .cse9) c_~N~0)))))) .cse0 .cse1) (or (and (or (< (+ |c_thread1Thread1of1ForFork1_#t~post5#1| 1) c_~N~0) (< c_~j~0 (+ c_~N~0 1))) (< |c_thread1Thread1of1ForFork1_#t~post5#1| c_~j~0)) (< c_~j~0 c_~N~0)) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#t2~0#1.base|) (= c_~j~0 0)))) is different from false [2022-11-16 11:35:23,211 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse19 (* c_~q1_back~0 4)) (.cse20 (* c_~q1_front~0 4)) (.cse18 (* c_~q2_front~0 4)) (.cse22 (< c_~j~0 c_~i~0))) (let ((.cse21 (or (= (* c_~q2_back~0 4) .cse18) .cse22)) (.cse8 (= .cse19 .cse20)) (.cse9 (or (< |c_#StackHeapBarrier| (+ |c_ULTIMATE.start_main_~#t2~0#1.base| 1)) .cse22)) (.cse10 (< c_~j~0 (+ c_~i~0 1)))) (let ((.cse2 (< 0 c_~q2_back~0)) (.cse5 (< 0 c_~q1_back~0)) (.cse3 (and .cse21 .cse8 .cse9 .cse10)) (.cse0 (not (<= 0 c_~q1_back~0))) (.cse6 (< 1 |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse7 (not (< c_~q2_back~0 c_~n2~0))) (.cse1 (not (< c_~q1_back~0 c_~n1~0))) (.cse4 (not (<= 0 c_~q2_back~0)))) (and (= c_~i~0 0) (or .cse0 .cse1 .cse2 .cse3 .cse4) (or .cse0 .cse2 .cse5 .cse3 .cse4) (or .cse0 .cse6 .cse7 .cse1 .cse3 .cse4) (or .cse0 .cse5 (and .cse8 .cse9 .cse10)) (or (let ((.cse12 (+ .cse20 c_~q1~0.offset)) (.cse13 (+ .cse19 c_~q1~0.offset)) (.cse15 (+ c_~q2~0.offset .cse18))) (and (forall ((v_ArrVal_245 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_245))) (or (forall ((~q1~0.base Int)) (let ((.cse11 (select .cse14 ~q1~0.base))) (or (< (select .cse11 .cse12) c_~N~0) (not (= (select .cse11 .cse13) c_~j~0))))) (< (+ (select (select .cse14 c_~q2~0.base) .cse15) 1) c_~N~0)))) (forall ((v_ArrVal_245 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_245))) (or (forall ((~q1~0.base Int)) (let ((.cse16 (select .cse17 ~q1~0.base))) (or (< (+ (select .cse16 .cse12) 1) c_~N~0) (not (= (select .cse16 .cse13) c_~j~0))))) (< (select (select .cse17 c_~q2~0.base) .cse15) c_~N~0)))))) .cse0 .cse1) (or (and (or (< (+ |c_thread1Thread1of1ForFork1_#t~post5#1| 1) c_~N~0) (< c_~j~0 (+ c_~N~0 1))) (< |c_thread1Thread1of1ForFork1_#t~post5#1| c_~j~0)) (< c_~j~0 c_~N~0)) (or (and .cse21 .cse8 (or (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse22) .cse10) .cse0 .cse6 .cse7 .cse1 .cse4) (or .cse0 .cse7 .cse1 (< 1 |c_ULTIMATE.start_create_fresh_int_array_#in~size#1|) .cse3 .cse4) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 .cse6 .cse7 .cse1 .cse4 (and .cse21 .cse8 .cse10 (or (< |c_ULTIMATE.start_create_fresh_int_array_#t~malloc24#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse22))) (= c_~j~0 0))))) is different from false [2022-11-16 11:36:10,908 INFO L130 PetriNetUnfolder]: 7451/14906 cut-off events. [2022-11-16 11:36:10,908 INFO L131 PetriNetUnfolder]: For 152908/153043 co-relation queries the response was YES. [2022-11-16 11:36:11,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94473 conditions, 14906 events. 7451/14906 cut-off events. For 152908/153043 co-relation queries the response was YES. Maximal size of possible extension queue 1414. Compared 141286 event pairs, 198 based on Foata normal form. 127/15002 useless extension candidates. Maximal degree in co-relation 94312. Up to 2818 conditions per place. [2022-11-16 11:36:11,468 INFO L137 encePairwiseOnDemand]: 120/178 looper letters, 922 selfloop transitions, 2834 changer transitions 30/3837 dead transitions. [2022-11-16 11:36:11,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1094 places, 3837 transitions, 48845 flow [2022-11-16 11:36:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2022-11-16 11:36:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2022-11-16 11:36:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 15158 transitions. [2022-11-16 11:36:11,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35482209737827713 [2022-11-16 11:36:11,500 INFO L72 ComplementDD]: Start complementDD. Operand 240 states and 15158 transitions. [2022-11-16 11:36:11,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 240 states and 15158 transitions. [2022-11-16 11:36:11,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:11,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 240 states and 15158 transitions. [2022-11-16 11:36:11,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 241 states, 240 states have (on average 63.15833333333333) internal successors, (15158), 240 states have internal predecessors, (15158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:11,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 241 states, 241 states have (on average 178.0) internal successors, (42898), 241 states have internal predecessors, (42898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:11,603 INFO L81 ComplementDD]: Finished complementDD. Result has 241 states, 241 states have (on average 178.0) internal successors, (42898), 241 states have internal predecessors, (42898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:11,604 INFO L175 Difference]: Start difference. First operand has 859 places, 1884 transitions, 18773 flow. Second operand 240 states and 15158 transitions. [2022-11-16 11:36:11,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1094 places, 3837 transitions, 48845 flow [2022-11-16 11:36:15,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1006 places, 3837 transitions, 48119 flow, removed 203 selfloop flow, removed 88 redundant places. [2022-11-16 11:36:15,295 INFO L231 Difference]: Finished difference. Result has 1080 places, 3384 transitions, 44205 flow [2022-11-16 11:36:15,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=18178, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=240, PETRI_FLOW=44205, PETRI_PLACES=1080, PETRI_TRANSITIONS=3384} [2022-11-16 11:36:15,297 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 919 predicate places. [2022-11-16 11:36:15,297 INFO L495 AbstractCegarLoop]: Abstraction has has 1080 places, 3384 transitions, 44205 flow [2022-11-16 11:36:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 61.54128440366973) internal successors, (6708), 109 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:15,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:15,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:15,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:15,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:36:15,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:15,499 INFO L85 PathProgramCache]: Analyzing trace with hash 893069534, now seen corresponding path program 5 times [2022-11-16 11:36:15,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332403210] [2022-11-16 11:36:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332403210] [2022-11-16 11:36:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332403210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183172454] [2022-11-16 11:36:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:36:28,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:28,588 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:28,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:36:28,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:36:28,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 11:36:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:33,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:36:34,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:36:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:35,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:36:36,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:36:36,291 INFO L321 Elim1Store]: treesize reduction 18, result has 55.0 percent of original size [2022-11-16 11:36:36,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 37 [2022-11-16 11:36:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:37,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:46,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:46,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 82 [2022-11-16 11:36:47,007 INFO L321 Elim1Store]: treesize reduction 5, result has 95.0 percent of original size [2022-11-16 11:36:47,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 415 treesize of output 462 [2022-11-16 11:36:47,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:36:47,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:47,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 315 [2022-11-16 11:36:47,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:36:47,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:47,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 286 treesize of output 326 [2022-11-16 11:37:01,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:01,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 82 [2022-11-16 11:37:01,545 INFO L321 Elim1Store]: treesize reduction 50, result has 50.5 percent of original size [2022-11-16 11:37:01,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 493 treesize of output 487 [2022-11-16 11:37:01,668 INFO L321 Elim1Store]: treesize reduction 40, result has 55.1 percent of original size [2022-11-16 11:37:01,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 365 treesize of output 371 [2022-11-16 11:37:01,753 INFO L321 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-11-16 11:37:01,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 377 treesize of output 325 [2022-11-16 11:37:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:12,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183172454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:12,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:12,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 44, 39] total 126 [2022-11-16 11:37:12,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160228990] [2022-11-16 11:37:12,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:12,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-11-16 11:37:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:12,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-11-16 11:37:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=15020, Unknown=8, NotChecked=0, Total=15750 [2022-11-16 11:37:12,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 178 [2022-11-16 11:37:12,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1080 places, 3384 transitions, 44205 flow. Second operand has 126 states, 126 states have (on average 52.317460317460316) internal successors, (6592), 126 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:12,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 178 [2022-11-16 11:37:12,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:39,253 INFO L130 PetriNetUnfolder]: 9598/19692 cut-off events. [2022-11-16 11:38:39,253 INFO L131 PetriNetUnfolder]: For 618889/619099 co-relation queries the response was YES. [2022-11-16 11:38:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174143 conditions, 19692 events. 9598/19692 cut-off events. For 618889/619099 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 196322 event pairs, 483 based on Foata normal form. 75/19715 useless extension candidates. Maximal degree in co-relation 173913. Up to 11725 conditions per place. [2022-11-16 11:38:40,330 INFO L137 encePairwiseOnDemand]: 114/178 looper letters, 2811 selfloop transitions, 3457 changer transitions 16/6328 dead transitions. [2022-11-16 11:38:40,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1202 places, 6328 transitions, 97716 flow [2022-11-16 11:38:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-11-16 11:38:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2022-11-16 11:38:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 7239 transitions. [2022-11-16 11:38:40,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30349656213315446 [2022-11-16 11:38:40,484 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 7239 transitions. [2022-11-16 11:38:40,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 7239 transitions. [2022-11-16 11:38:40,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:40,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 7239 transitions. [2022-11-16 11:38:40,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 54.02238805970149) internal successors, (7239), 134 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:40,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 178.0) internal successors, (24030), 135 states have internal predecessors, (24030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:40,531 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 178.0) internal successors, (24030), 135 states have internal predecessors, (24030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:40,532 INFO L175 Difference]: Start difference. First operand has 1080 places, 3384 transitions, 44205 flow. Second operand 134 states and 7239 transitions. [2022-11-16 11:38:40,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1202 places, 6328 transitions, 97716 flow [2022-11-16 11:38:53,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1130 places, 6328 transitions, 94697 flow, removed 1350 selfloop flow, removed 72 redundant places. [2022-11-16 11:38:53,876 INFO L231 Difference]: Finished difference. Result has 1184 places, 5639 transitions, 88237 flow [2022-11-16 11:38:53,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=42301, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=88237, PETRI_PLACES=1184, PETRI_TRANSITIONS=5639} [2022-11-16 11:38:53,880 INFO L288 CegarLoopForPetriNet]: 161 programPoint places, 1023 predicate places. [2022-11-16 11:38:53,881 INFO L495 AbstractCegarLoop]: Abstraction has has 1184 places, 5639 transitions, 88237 flow [2022-11-16 11:38:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 52.317460317460316) internal successors, (6592), 126 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:53,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:53,882 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:53,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:54,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:38:54,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash 607357010, now seen corresponding path program 6 times [2022-11-16 11:38:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:54,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810701797] [2022-11-16 11:38:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:01,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:01,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810701797] [2022-11-16 11:39:01,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810701797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:01,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038731340] [2022-11-16 11:39:01,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:39:01,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:01,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:01,107 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:01,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3405bf39-e8f8-492f-b514-a94f6c61febf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:39:01,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:39:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 11:39:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:05,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:39:06,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:39:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:06,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-16 11:39:08,840 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 11:39:08,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 20 [2022-11-16 11:39:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:09,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:16,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:16,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 96 [2022-11-16 11:39:16,679 INFO L321 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2022-11-16 11:39:16,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1057 treesize of output 1001 [2022-11-16 11:39:16,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:16,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 881 treesize of output 709 [2022-11-16 11:39:16,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:16,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 668 treesize of output 642 [2022-11-16 11:39:45,126 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 11:39:45,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 1 [2022-11-16 11:39:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:52,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038731340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:52,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:52,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 111 [2022-11-16 11:39:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886664198] [2022-11-16 11:39:52,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:52,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-16 11:39:52,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-16 11:39:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=798, Invalid=11402, Unknown=10, NotChecked=0, Total=12210 [2022-11-16 11:39:52,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 178 [2022-11-16 11:39:52,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1184 places, 5639 transitions, 88237 flow. Second operand has 111 states, 111 states have (on average 59.513513513513516) internal successors, (6606), 111 states have internal predecessors, (6606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:52,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:39:52,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 178 [2022-11-16 11:39:52,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand