./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN --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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- 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-6b4ec56 [2022-11-20 12:36:56,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:36:56,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:36:56,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:36:56,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:36:56,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:36:56,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:36:56,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:36:56,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:36:56,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:36:56,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:36:56,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:36:56,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:36:56,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:36:56,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:36:56,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:36:56,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:36:56,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:36:56,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:36:56,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:36:56,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:36:56,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:36:56,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:36:56,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:36:56,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:36:56,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:36:56,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:36:56,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:36:56,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:36:56,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:36:56,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:36:56,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:36:56,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:36:56,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:36:56,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:36:56,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:36:56,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:36:56,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:36:56,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:36:56,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:36:56,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:36:56,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:36:56,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:36:56,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:36:56,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:36:56,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:36:56,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:36:56,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:36:56,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:36:56,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:36:56,424 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:36:56,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:36:56,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:36:56,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:36:56,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:36:56,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:36:56,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:36:56,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:36:56,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:36:56,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:36:56,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:36:56,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:36:56,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:36:56,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:36:56,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:36:56,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:36:56,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:36:56,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:36:56,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:36:56,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:36:56,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:36:56,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:36:56,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:36:56,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:36:56,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:36:56,432 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_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-11-20 12:36:56,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:36:56,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:36:56,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:36:56,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:36:56,743 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:36:56,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-20 12:36:59,830 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:37:00,069 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:37:00,070 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-20 12:37:00,077 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/data/19c272774/e38cdbb7cf644b52a405bbe385ab8b42/FLAG17dbd2915 [2022-11-20 12:37:00,099 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/data/19c272774/e38cdbb7cf644b52a405bbe385ab8b42 [2022-11-20 12:37:00,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:37:00,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:37:00,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:37:00,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:37:00,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:37:00,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4876c5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00, skipping insertion in model container [2022-11-20 12:37:00,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:37:00,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:37:00,398 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-20 12:37:00,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:37:00,434 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:37:00,476 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-20 12:37:00,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:37:00,500 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:37:00,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00 WrapperNode [2022-11-20 12:37:00,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:37:00,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:37:00,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:37:00,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:37:00,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,568 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-11-20 12:37:00,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:37:00,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:37:00,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:37:00,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:37:00,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:37:00,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:37:00,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:37:00,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:37:00,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (1/1) ... [2022-11-20 12:37:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:37:00,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:00,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:37:00,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:37:00,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:37:00,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:37:00,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:37:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:37:00,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:37:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:37:00,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:37:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:37:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:37:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:37:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:37:00,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:37:00,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:37:00,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:37:00,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:37:00,724 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:37:00,833 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:37:00,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:37:01,199 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:37:01,337 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:37:01,337 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 12:37:01,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:37:01 BoogieIcfgContainer [2022-11-20 12:37:01,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:37:01,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:37:01,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:37:01,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:37:01,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:37:00" (1/3) ... [2022-11-20 12:37:01,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265fc863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:37:01, skipping insertion in model container [2022-11-20 12:37:01,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:37:00" (2/3) ... [2022-11-20 12:37:01,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265fc863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:37:01, skipping insertion in model container [2022-11-20 12:37:01,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:37:01" (3/3) ... [2022-11-20 12:37:01,364 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-11-20 12:37:01,375 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:37:01,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:37:01,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:37:01,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:37:01,454 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:37:01,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-11-20 12:37:01,624 INFO L130 PetriNetUnfolder]: 9/114 cut-off events. [2022-11-20 12:37:01,625 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:37:01,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-20 12:37:01,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-11-20 12:37:01,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-11-20 12:37:01,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:37:01,667 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;@515aa60f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:37:01,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 12:37:01,720 INFO L130 PetriNetUnfolder]: 9/104 cut-off events. [2022-11-20 12:37:01,720 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:37:01,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:01,721 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] [2022-11-20 12:37:01,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -828941967, now seen corresponding path program 1 times [2022-11-20 12:37:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:01,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112233828] [2022-11-20 12:37:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112233828] [2022-11-20 12:37:01,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112233828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:01,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:01,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:37:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310640695] [2022-11-20 12:37:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:37:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:37:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:37:02,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-11-20 12:37:02,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:02,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-11-20 12:37:02,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:02,053 INFO L130 PetriNetUnfolder]: 5/101 cut-off events. [2022-11-20 12:37:02,053 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 12:37:02,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-11-20 12:37:02,055 INFO L137 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-11-20 12:37:02,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-11-20 12:37:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:37:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:37:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-11-20 12:37:02,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-11-20 12:37:02,071 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-11-20 12:37:02,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-11-20 12:37:02,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:02,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-11-20 12:37:02,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,084 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,086 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-11-20 12:37:02,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-11-20 12:37:02,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:37:02,094 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-11-20 12:37:02,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-11-20 12:37:02,100 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-11-20 12:37:02,101 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-11-20 12:37:02,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:02,102 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] [2022-11-20 12:37:02,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:37:02,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -273104978, now seen corresponding path program 1 times [2022-11-20 12:37:02,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471875722] [2022-11-20 12:37:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:02,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:02,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:02,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471875722] [2022-11-20 12:37:02,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471875722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:02,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:02,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:37:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109616064] [2022-11-20 12:37:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:37:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:37:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:37:02,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-20 12:37:02,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:02,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-20 12:37:02,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:02,923 INFO L130 PetriNetUnfolder]: 7/116 cut-off events. [2022-11-20 12:37:02,923 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 12:37:02,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 116 events. 7/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 148. Up to 15 conditions per place. [2022-11-20 12:37:02,926 INFO L137 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-11-20 12:37:02,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-11-20 12:37:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:37:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:37:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-11-20 12:37:02,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-11-20 12:37:02,935 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-11-20 12:37:02,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-11-20 12:37:02,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:02,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-11-20 12:37:02,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,945 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-11-20 12:37:02,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-11-20 12:37:02,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:37:02,950 INFO L231 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-11-20 12:37:02,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-11-20 12:37:02,952 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-11-20 12:37:02,952 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-11-20 12:37:02,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:02,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:02,954 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] [2022-11-20 12:37:02,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:37:02,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash -831271080, now seen corresponding path program 1 times [2022-11-20 12:37:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497095020] [2022-11-20 12:37:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:02,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497095020] [2022-11-20 12:37:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497095020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:03,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:03,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:37:03,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091474014] [2022-11-20 12:37:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:37:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:37:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:37:03,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-20 12:37:03,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:03,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-20 12:37:03,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:03,146 INFO L130 PetriNetUnfolder]: 8/138 cut-off events. [2022-11-20 12:37:03,146 INFO L131 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-11-20 12:37:03,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-11-20 12:37:03,148 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-11-20 12:37:03,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-11-20 12:37:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:37:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:37:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-11-20 12:37:03,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-11-20 12:37:03,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-11-20 12:37:03,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-11-20 12:37:03,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:03,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-11-20 12:37:03,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,155 INFO L175 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-11-20 12:37:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-11-20 12:37:03,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 12:37:03,161 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-11-20 12:37:03,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-11-20 12:37:03,164 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-11-20 12:37:03,165 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-11-20 12:37:03,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:03,166 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] [2022-11-20 12:37:03,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:37:03,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:03,167 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2022-11-20 12:37:03,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:03,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56986725] [2022-11-20 12:37:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:03,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:03,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56986725] [2022-11-20 12:37:03,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56986725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:03,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:03,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:37:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076703179] [2022-11-20 12:37:03,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:37:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:37:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:37:03,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-11-20 12:37:03,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:03,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-11-20 12:37:03,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:03,795 INFO L130 PetriNetUnfolder]: 8/184 cut-off events. [2022-11-20 12:37:03,796 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-20 12:37:03,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 370 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2022-11-20 12:37:03,797 INFO L137 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2022-11-20 12:37:03,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2022-11-20 12:37:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:37:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:37:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2022-11-20 12:37:03,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2022-11-20 12:37:03,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2022-11-20 12:37:03,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2022-11-20 12:37:03,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:03,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2022-11-20 12:37:03,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,808 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,808 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2022-11-20 12:37:03,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2022-11-20 12:37:03,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:37:03,811 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2022-11-20 12:37:03,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-11-20 12:37:03,812 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-11-20 12:37:03,813 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2022-11-20 12:37:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:03,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:03,814 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] [2022-11-20 12:37:03,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:37:03,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 201863395, now seen corresponding path program 1 times [2022-11-20 12:37:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685782074] [2022-11-20 12:37:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:04,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685782074] [2022-11-20 12:37:04,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685782074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153597860] [2022-11-20 12:37:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:04,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:04,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:04,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:04,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:37:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 12:37:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:05,214 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 [2022-11-20 12:37:05,425 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:37:05,425 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 [2022-11-20 12:37:05,760 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 [2022-11-20 12:37:05,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:37:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:05,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:06,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:37:06,059 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 45 treesize of output 36 [2022-11-20 12:37:06,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 12:37:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:06,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153597860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:06,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:06,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-11-20 12:37:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355528505] [2022-11-20 12:37:06,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:06,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 12:37:06,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 12:37:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:37:06,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 116 [2022-11-20 12:37:06,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 24 states, 24 states have (on average 61.416666666666664) internal successors, (1474), 24 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:06,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:06,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 116 [2022-11-20 12:37:06,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:07,186 INFO L130 PetriNetUnfolder]: 22/210 cut-off events. [2022-11-20 12:37:07,186 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-20 12:37:07,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 210 events. 22/210 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 476 event pairs, 0 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 349. Up to 26 conditions per place. [2022-11-20 12:37:07,188 INFO L137 encePairwiseOnDemand]: 100/116 looper letters, 45 selfloop transitions, 14 changer transitions 8/119 dead transitions. [2022-11-20 12:37:07,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 119 transitions, 433 flow [2022-11-20 12:37:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:37:07,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 12:37:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1054 transitions. [2022-11-20 12:37:07,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2022-11-20 12:37:07,192 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1054 transitions. [2022-11-20 12:37:07,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1054 transitions. [2022-11-20 12:37:07,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:07,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1054 transitions. [2022-11-20 12:37:07,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.0) internal successors, (1054), 17 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,200 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,201 INFO L175 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 17 states and 1054 transitions. [2022-11-20 12:37:07,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 119 transitions, 433 flow [2022-11-20 12:37:07,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 119 transitions, 421 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 12:37:07,204 INFO L231 Difference]: Finished difference. Result has 123 places, 100 transitions, 274 flow [2022-11-20 12:37:07,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=274, PETRI_PLACES=123, PETRI_TRANSITIONS=100} [2022-11-20 12:37:07,206 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 20 predicate places. [2022-11-20 12:37:07,206 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 100 transitions, 274 flow [2022-11-20 12:37:07,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.416666666666664) internal successors, (1474), 24 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:07,207 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:07,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:37:07,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:07,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash -185018615, now seen corresponding path program 2 times [2022-11-20 12:37:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:07,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308661121] [2022-11-20 12:37:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308661121] [2022-11-20 12:37:07,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308661121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592383575] [2022-11-20 12:37:07,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:37:07,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:07,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:37:07,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:37:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:37:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:07,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:37:07,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592383575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:07,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:07,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-20 12:37:07,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424244615] [2022-11-20 12:37:07,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:37:07,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:37:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:37:07,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-20 12:37:07,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 100 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:07,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-20 12:37:07,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:07,989 INFO L130 PetriNetUnfolder]: 17/257 cut-off events. [2022-11-20 12:37:07,989 INFO L131 PetriNetUnfolder]: For 128/129 co-relation queries the response was YES. [2022-11-20 12:37:07,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 257 events. 17/257 cut-off events. For 128/129 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 826 event pairs, 2 based on Foata normal form. 5/247 useless extension candidates. Maximal degree in co-relation 387. Up to 22 conditions per place. [2022-11-20 12:37:07,991 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 14 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2022-11-20 12:37:07,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 111 transitions, 365 flow [2022-11-20 12:37:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:37:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:37:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2022-11-20 12:37:07,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2022-11-20 12:37:07,994 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2022-11-20 12:37:07,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2022-11-20 12:37:07,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:07,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2022-11-20 12:37:07,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:07,997 INFO L175 Difference]: Start difference. First operand has 123 places, 100 transitions, 274 flow. Second operand 4 states and 425 transitions. [2022-11-20 12:37:07,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 111 transitions, 365 flow [2022-11-20 12:37:07,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 111 transitions, 322 flow, removed 4 selfloop flow, removed 16 redundant places. [2022-11-20 12:37:08,000 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 300 flow [2022-11-20 12:37:08,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2022-11-20 12:37:08,001 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-11-20 12:37:08,002 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 300 flow [2022-11-20 12:37:08,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:08,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:08,002 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:08,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:37:08,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 12:37:08,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 808495847, now seen corresponding path program 3 times [2022-11-20 12:37:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134354252] [2022-11-20 12:37:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:37:08,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:08,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134354252] [2022-11-20 12:37:08,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134354252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:08,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172158170] [2022-11-20 12:37:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:37:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:08,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:08,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:08,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:37:08,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:37:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:37:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:37:09,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:37:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172158170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:09,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:09,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-20 12:37:09,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301086296] [2022-11-20 12:37:09,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:37:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:37:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:37:09,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-20 12:37:09,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 300 flow. Second operand has 26 states, 26 states have (on average 88.5) internal successors, (2301), 26 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:09,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:09,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-20 12:37:09,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:10,168 INFO L130 PetriNetUnfolder]: 28/458 cut-off events. [2022-11-20 12:37:10,168 INFO L131 PetriNetUnfolder]: For 306/307 co-relation queries the response was YES. [2022-11-20 12:37:10,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 458 events. 28/458 cut-off events. For 306/307 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2265 event pairs, 0 based on Foata normal form. 5/436 useless extension candidates. Maximal degree in co-relation 745. Up to 29 conditions per place. [2022-11-20 12:37:10,173 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 37 selfloop transitions, 30 changer transitions 9/149 dead transitions. [2022-11-20 12:37:10,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 640 flow [2022-11-20 12:37:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:37:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:37:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-11-20 12:37:10,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7705254515599343 [2022-11-20 12:37:10,178 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-11-20 12:37:10,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-11-20 12:37:10,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:10,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-11-20 12:37:10,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:10,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:10,191 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 116.0) internal successors, (2552), 22 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:10,192 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 300 flow. Second operand 21 states and 1877 transitions. [2022-11-20 12:37:10,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 640 flow [2022-11-20 12:37:10,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 149 transitions, 630 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-20 12:37:10,199 INFO L231 Difference]: Finished difference. Result has 136 places, 120 transitions, 493 flow [2022-11-20 12:37:10,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=493, PETRI_PLACES=136, PETRI_TRANSITIONS=120} [2022-11-20 12:37:10,201 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2022-11-20 12:37:10,201 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 120 transitions, 493 flow [2022-11-20 12:37:10,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 88.5) internal successors, (2301), 26 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:10,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:10,203 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:10,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 12:37:10,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 12:37:10,409 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -654033465, now seen corresponding path program 4 times [2022-11-20 12:37:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:10,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601190209] [2022-11-20 12:37:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:10,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:10,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601190209] [2022-11-20 12:37:10,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601190209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:10,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248358362] [2022-11-20 12:37:10,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:37:10,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:10,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:10,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:37:10,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:37:10,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:37:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:11,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:11,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248358362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:11,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-20 12:37:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948238439] [2022-11-20 12:37:11,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:37:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:37:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:37:11,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-20 12:37:11,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 120 transitions, 493 flow. Second operand has 25 states, 25 states have (on average 88.6) internal successors, (2215), 25 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:11,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:11,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-20 12:37:11,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:12,236 INFO L130 PetriNetUnfolder]: 19/348 cut-off events. [2022-11-20 12:37:12,236 INFO L131 PetriNetUnfolder]: For 299/300 co-relation queries the response was YES. [2022-11-20 12:37:12,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 348 events. 19/348 cut-off events. For 299/300 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1363 event pairs, 3 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 604. Up to 30 conditions per place. [2022-11-20 12:37:12,238 INFO L137 encePairwiseOnDemand]: 103/116 looper letters, 29 selfloop transitions, 14 changer transitions 13/129 dead transitions. [2022-11-20 12:37:12,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 129 transitions, 577 flow [2022-11-20 12:37:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:37:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-20 12:37:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1339 transitions. [2022-11-20 12:37:12,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7695402298850574 [2022-11-20 12:37:12,243 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1339 transitions. [2022-11-20 12:37:12,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1339 transitions. [2022-11-20 12:37:12,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:12,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1339 transitions. [2022-11-20 12:37:12,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.26666666666667) internal successors, (1339), 15 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:12,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:12,251 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:12,251 INFO L175 Difference]: Start difference. First operand has 136 places, 120 transitions, 493 flow. Second operand 15 states and 1339 transitions. [2022-11-20 12:37:12,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 129 transitions, 577 flow [2022-11-20 12:37:12,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 129 transitions, 528 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-11-20 12:37:12,256 INFO L231 Difference]: Finished difference. Result has 139 places, 110 transitions, 368 flow [2022-11-20 12:37:12,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=368, PETRI_PLACES=139, PETRI_TRANSITIONS=110} [2022-11-20 12:37:12,259 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 36 predicate places. [2022-11-20 12:37:12,260 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 110 transitions, 368 flow [2022-11-20 12:37:12,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.6) internal successors, (2215), 25 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:12,261 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:12,261 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:12,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:37:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:12,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1938461094, now seen corresponding path program 5 times [2022-11-20 12:37:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:12,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758526990] [2022-11-20 12:37:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:12,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:37:13,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:13,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758526990] [2022-11-20 12:37:13,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758526990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:13,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717389423] [2022-11-20 12:37:13,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:37:13,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:13,569 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:13,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:37:13,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 12:37:13,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 12:37:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:14,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:37:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:37:14,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:14,329 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 12:37:14,330 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 28 treesize of output 13 [2022-11-20 12:37:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:37:14,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717389423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:14,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:14,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 9] total 23 [2022-11-20 12:37:14,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723153412] [2022-11-20 12:37:14,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:14,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:37:14,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:14,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:37:14,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:37:14,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-20 12:37:14,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 110 transitions, 368 flow. Second operand has 23 states, 23 states have (on average 64.17391304347827) internal successors, (1476), 23 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:14,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:14,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-20 12:37:14,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:37:15,563 INFO L130 PetriNetUnfolder]: 100/716 cut-off events. [2022-11-20 12:37:15,563 INFO L131 PetriNetUnfolder]: For 815/815 co-relation queries the response was YES. [2022-11-20 12:37:15,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 716 events. 100/716 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4514 event pairs, 0 based on Foata normal form. 5/664 useless extension candidates. Maximal degree in co-relation 1474. Up to 74 conditions per place. [2022-11-20 12:37:15,571 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 88 selfloop transitions, 38 changer transitions 45/221 dead transitions. [2022-11-20 12:37:15,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 221 transitions, 1144 flow [2022-11-20 12:37:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:37:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 12:37:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2571 transitions. [2022-11-20 12:37:15,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5540948275862069 [2022-11-20 12:37:15,582 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2571 transitions. [2022-11-20 12:37:15,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2571 transitions. [2022-11-20 12:37:15,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:37:15,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2571 transitions. [2022-11-20 12:37:15,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.275) internal successors, (2571), 40 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:15,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 116.0) internal successors, (4756), 41 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:15,599 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 116.0) internal successors, (4756), 41 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:15,599 INFO L175 Difference]: Start difference. First operand has 139 places, 110 transitions, 368 flow. Second operand 40 states and 2571 transitions. [2022-11-20 12:37:15,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 221 transitions, 1144 flow [2022-11-20 12:37:15,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 221 transitions, 1115 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-11-20 12:37:15,606 INFO L231 Difference]: Finished difference. Result has 177 places, 126 transitions, 602 flow [2022-11-20 12:37:15,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=602, PETRI_PLACES=177, PETRI_TRANSITIONS=126} [2022-11-20 12:37:15,607 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 74 predicate places. [2022-11-20 12:37:15,607 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 126 transitions, 602 flow [2022-11-20 12:37:15,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.17391304347827) internal successors, (1476), 23 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:15,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:37:15,608 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:15,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:37:15,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:15,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:37:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1237883814, now seen corresponding path program 6 times [2022-11-20 12:37:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:15,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794290465] [2022-11-20 12:37:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:37:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794290465] [2022-11-20 12:37:16,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794290465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781272292] [2022-11-20 12:37:16,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:37:16,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:16,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:16,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:37:17,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 12:37:17,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 12:37:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:17,819 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 [2022-11-20 12:37:18,240 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 [2022-11-20 12:37:18,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:18,479 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 19 treesize of output 21 [2022-11-20 12:37:18,678 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 12:37:18,678 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 21 treesize of output 10 [2022-11-20 12:37:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:18,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:20,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:37:20,287 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 61 treesize of output 49 [2022-11-20 12:37:20,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:37:20,300 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 108 treesize of output 105 [2022-11-20 12:37:20,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-20 12:37:20,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:37:20,322 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 55 treesize of output 56 [2022-11-20 12:37:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:37:22,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781272292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:22,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:22,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 27] total 59 [2022-11-20 12:37:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61446056] [2022-11-20 12:37:22,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 12:37:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 12:37:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3087, Unknown=12, NotChecked=0, Total=3422 [2022-11-20 12:37:22,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 116 [2022-11-20 12:37:22,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 126 transitions, 602 flow. Second operand has 59 states, 59 states have (on average 51.559322033898304) internal successors, (3042), 59 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:22,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:37:22,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 116 [2022-11-20 12:37:22,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:38:39,607 WARN L233 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 117 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:38:58,161 WARN L233 SmtUtils]: Spent 18.46s on a formula simplification. DAG size of input: 95 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:39:17,263 WARN L233 SmtUtils]: Spent 18.59s on a formula simplification. DAG size of input: 114 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:39:34,499 WARN L233 SmtUtils]: Spent 16.39s on a formula simplification. DAG size of input: 89 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:39:45,295 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 118 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:40:01,707 WARN L233 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 79 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:40:02,340 INFO L130 PetriNetUnfolder]: 278/1671 cut-off events. [2022-11-20 12:40:02,340 INFO L131 PetriNetUnfolder]: For 3944/3962 co-relation queries the response was YES. [2022-11-20 12:40:02,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1671 events. 278/1671 cut-off events. For 3944/3962 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14606 event pairs, 0 based on Foata normal form. 20/1554 useless extension candidates. Maximal degree in co-relation 3981. Up to 206 conditions per place. [2022-11-20 12:40:02,357 INFO L137 encePairwiseOnDemand]: 84/116 looper letters, 108 selfloop transitions, 125 changer transitions 38/314 dead transitions. [2022-11-20 12:40:02,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 314 transitions, 2374 flow [2022-11-20 12:40:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 12:40:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-20 12:40:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3213 transitions. [2022-11-20 12:40:02,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4540700960994912 [2022-11-20 12:40:02,366 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3213 transitions. [2022-11-20 12:40:02,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3213 transitions. [2022-11-20 12:40:02,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:02,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3213 transitions. [2022-11-20 12:40:02,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 52.67213114754098) internal successors, (3213), 61 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:02,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 116.0) internal successors, (7192), 62 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:02,390 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 116.0) internal successors, (7192), 62 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:02,390 INFO L175 Difference]: Start difference. First operand has 177 places, 126 transitions, 602 flow. Second operand 61 states and 3213 transitions. [2022-11-20 12:40:02,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 314 transitions, 2374 flow [2022-11-20 12:40:02,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 314 transitions, 1940 flow, removed 159 selfloop flow, removed 29 redundant places. [2022-11-20 12:40:02,408 INFO L231 Difference]: Finished difference. Result has 224 places, 210 transitions, 1491 flow [2022-11-20 12:40:02,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1491, PETRI_PLACES=224, PETRI_TRANSITIONS=210} [2022-11-20 12:40:02,409 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 121 predicate places. [2022-11-20 12:40:02,409 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 210 transitions, 1491 flow [2022-11-20 12:40:02,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 51.559322033898304) internal successors, (3042), 59 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:02,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:02,412 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:02,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 12:40:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:40:02,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1676617026, now seen corresponding path program 7 times [2022-11-20 12:40:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:02,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693761408] [2022-11-20 12:40:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:40:02,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:02,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693761408] [2022-11-20 12:40:02,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693761408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:02,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355771985] [2022-11-20 12:40:02,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:40:02,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:02,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:02,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:40:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:02,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:40:02,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:40:03,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:40:03,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355771985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:03,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:03,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-20 12:40:03,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538701369] [2022-11-20 12:40:03,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:03,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:40:03,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:40:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:40:03,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-20 12:40:03,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 210 transitions, 1491 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:03,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:03,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-20 12:40:03,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:03,758 INFO L130 PetriNetUnfolder]: 383/2595 cut-off events. [2022-11-20 12:40:03,758 INFO L131 PetriNetUnfolder]: For 18757/19194 co-relation queries the response was YES. [2022-11-20 12:40:03,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8262 conditions, 2595 events. 383/2595 cut-off events. For 18757/19194 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26795 event pairs, 20 based on Foata normal form. 81/2445 useless extension candidates. Maximal degree in co-relation 8216. Up to 380 conditions per place. [2022-11-20 12:40:03,799 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 84 selfloop transitions, 82 changer transitions 16/296 dead transitions. [2022-11-20 12:40:03,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 296 transitions, 2824 flow [2022-11-20 12:40:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:40:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:40:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2022-11-20 12:40:03,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2022-11-20 12:40:03,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2022-11-20 12:40:03,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2022-11-20 12:40:03,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:03,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2022-11-20 12:40:03,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:03,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:03,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:03,805 INFO L175 Difference]: Start difference. First operand has 224 places, 210 transitions, 1491 flow. Second operand 5 states and 532 transitions. [2022-11-20 12:40:03,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 296 transitions, 2824 flow [2022-11-20 12:40:03,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 296 transitions, 2593 flow, removed 95 selfloop flow, removed 25 redundant places. [2022-11-20 12:40:03,869 INFO L231 Difference]: Finished difference. Result has 199 places, 271 transitions, 2472 flow [2022-11-20 12:40:03,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2472, PETRI_PLACES=199, PETRI_TRANSITIONS=271} [2022-11-20 12:40:03,870 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 96 predicate places. [2022-11-20 12:40:03,870 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 271 transitions, 2472 flow [2022-11-20 12:40:03,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:03,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:03,871 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:03,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:40:04,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1068405372, now seen corresponding path program 8 times [2022-11-20 12:40:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:04,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618865611] [2022-11-20 12:40:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:04,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:40:04,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618865611] [2022-11-20 12:40:04,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618865611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369482521] [2022-11-20 12:40:04,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:40:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:04,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:04,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:40:04,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:40:04,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:04,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:40:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:40:05,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:40:05,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369482521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:05,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:05,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-11-20 12:40:05,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70008365] [2022-11-20 12:40:05,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:40:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:05,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:40:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:40:05,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-20 12:40:05,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 271 transitions, 2472 flow. Second operand has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:05,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:05,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-20 12:40:05,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:07,147 INFO L130 PetriNetUnfolder]: 280/2558 cut-off events. [2022-11-20 12:40:07,147 INFO L131 PetriNetUnfolder]: For 23558/24217 co-relation queries the response was YES. [2022-11-20 12:40:07,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8282 conditions, 2558 events. 280/2558 cut-off events. For 23558/24217 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 26837 event pairs, 42 based on Foata normal form. 129/2447 useless extension candidates. Maximal degree in co-relation 8239. Up to 395 conditions per place. [2022-11-20 12:40:07,175 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 81 selfloop transitions, 25 changer transitions 99/280 dead transitions. [2022-11-20 12:40:07,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 2953 flow [2022-11-20 12:40:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:40:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 12:40:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1961 transitions. [2022-11-20 12:40:07,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7684169278996865 [2022-11-20 12:40:07,179 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1961 transitions. [2022-11-20 12:40:07,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1961 transitions. [2022-11-20 12:40:07,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:07,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1961 transitions. [2022-11-20 12:40:07,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.13636363636364) internal successors, (1961), 22 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:07,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:07,192 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:07,193 INFO L175 Difference]: Start difference. First operand has 199 places, 271 transitions, 2472 flow. Second operand 22 states and 1961 transitions. [2022-11-20 12:40:07,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 2953 flow [2022-11-20 12:40:07,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 280 transitions, 2833 flow, removed 60 selfloop flow, removed 0 redundant places. [2022-11-20 12:40:07,255 INFO L231 Difference]: Finished difference. Result has 224 places, 172 transitions, 1402 flow [2022-11-20 12:40:07,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1402, PETRI_PLACES=224, PETRI_TRANSITIONS=172} [2022-11-20 12:40:07,257 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 121 predicate places. [2022-11-20 12:40:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 172 transitions, 1402 flow [2022-11-20 12:40:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:07,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:07,258 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:07,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:40:07,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash 90298013, now seen corresponding path program 9 times [2022-11-20 12:40:07,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216605616] [2022-11-20 12:40:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:08,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216605616] [2022-11-20 12:40:08,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216605616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100846610] [2022-11-20 12:40:08,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:40:08,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:08,618 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:08,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:40:08,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:40:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:40:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:09,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 12:40:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:40:09,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:09,291 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 12:40:09,292 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 28 treesize of output 13 [2022-11-20 12:40:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:40:09,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100846610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:09,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:09,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 28 [2022-11-20 12:40:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480046627] [2022-11-20 12:40:09,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:09,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 12:40:09,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 12:40:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:40:09,421 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-20 12:40:09,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 172 transitions, 1402 flow. Second operand has 28 states, 28 states have (on average 63.57142857142857) internal successors, (1780), 28 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) [2022-11-20 12:40:09,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:09,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-20 12:40:09,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:12,145 INFO L130 PetriNetUnfolder]: 439/2603 cut-off events. [2022-11-20 12:40:12,145 INFO L131 PetriNetUnfolder]: For 20438/20440 co-relation queries the response was YES. [2022-11-20 12:40:12,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9358 conditions, 2603 events. 439/2603 cut-off events. For 20438/20440 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 25201 event pairs, 0 based on Foata normal form. 20/2410 useless extension candidates. Maximal degree in co-relation 9310. Up to 419 conditions per place. [2022-11-20 12:40:12,176 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 156 selfloop transitions, 127 changer transitions 108/441 dead transitions. [2022-11-20 12:40:12,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 441 transitions, 5415 flow [2022-11-20 12:40:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-20 12:40:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-20 12:40:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5013 transitions. [2022-11-20 12:40:12,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5540450928381963 [2022-11-20 12:40:12,186 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5013 transitions. [2022-11-20 12:40:12,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5013 transitions. [2022-11-20 12:40:12,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:12,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5013 transitions. [2022-11-20 12:40:12,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 64.26923076923077) internal successors, (5013), 78 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:12,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 116.0) internal successors, (9164), 79 states have internal predecessors, (9164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:12,215 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 116.0) internal successors, (9164), 79 states have internal predecessors, (9164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:12,216 INFO L175 Difference]: Start difference. First operand has 224 places, 172 transitions, 1402 flow. Second operand 78 states and 5013 transitions. [2022-11-20 12:40:12,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 441 transitions, 5415 flow [2022-11-20 12:40:12,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 441 transitions, 3724 flow, removed 817 selfloop flow, removed 33 redundant places. [2022-11-20 12:40:12,276 INFO L231 Difference]: Finished difference. Result has 278 places, 220 transitions, 2285 flow [2022-11-20 12:40:12,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2285, PETRI_PLACES=278, PETRI_TRANSITIONS=220} [2022-11-20 12:40:12,277 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 175 predicate places. [2022-11-20 12:40:12,277 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 220 transitions, 2285 flow [2022-11-20 12:40:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 63.57142857142857) internal successors, (1780), 28 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) [2022-11-20 12:40:12,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:12,278 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:12,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:12,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:40:12,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash -843056299, now seen corresponding path program 10 times [2022-11-20 12:40:12,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:12,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742081455] [2022-11-20 12:40:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:12,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:14,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742081455] [2022-11-20 12:40:14,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742081455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126834942] [2022-11-20 12:40:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:40:14,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:14,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:14,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:40:14,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:40:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 12:40:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:15,449 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 19 treesize of output 21 [2022-11-20 12:40:15,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:40:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:40:15,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:15,852 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_319 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)) is different from false [2022-11-20 12:40:15,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:40:15,883 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 47 treesize of output 37 [2022-11-20 12:40:15,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-20 12:40:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:40:16,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126834942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:16,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:16,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 18] total 55 [2022-11-20 12:40:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354628351] [2022-11-20 12:40:16,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:16,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 12:40:16,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 12:40:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2625, Unknown=1, NotChecked=104, Total=2970 [2022-11-20 12:40:16,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 116 [2022-11-20 12:40:16,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 220 transitions, 2285 flow. Second operand has 55 states, 55 states have (on average 52.74545454545454) internal successors, (2901), 55 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:16,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:16,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 116 [2022-11-20 12:40:16,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:20,716 INFO L130 PetriNetUnfolder]: 874/5070 cut-off events. [2022-11-20 12:40:20,717 INFO L131 PetriNetUnfolder]: For 24520/24592 co-relation queries the response was YES. [2022-11-20 12:40:20,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14656 conditions, 5070 events. 874/5070 cut-off events. For 24520/24592 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 58232 event pairs, 36 based on Foata normal form. 30/4650 useless extension candidates. Maximal degree in co-relation 14587. Up to 705 conditions per place. [2022-11-20 12:40:20,760 INFO L137 encePairwiseOnDemand]: 87/116 looper letters, 168 selfloop transitions, 216 changer transitions 42/469 dead transitions. [2022-11-20 12:40:20,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 469 transitions, 5794 flow [2022-11-20 12:40:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 12:40:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-20 12:40:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2819 transitions. [2022-11-20 12:40:20,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46734084880636606 [2022-11-20 12:40:20,766 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2819 transitions. [2022-11-20 12:40:20,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2819 transitions. [2022-11-20 12:40:20,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:20,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2819 transitions. [2022-11-20 12:40:20,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.21153846153846) internal successors, (2819), 52 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:20,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 116.0) internal successors, (6148), 53 states have internal predecessors, (6148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:20,782 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 116.0) internal successors, (6148), 53 states have internal predecessors, (6148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:20,782 INFO L175 Difference]: Start difference. First operand has 278 places, 220 transitions, 2285 flow. Second operand 52 states and 2819 transitions. [2022-11-20 12:40:20,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 469 transitions, 5794 flow [2022-11-20 12:40:20,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 469 transitions, 4867 flow, removed 292 selfloop flow, removed 55 redundant places. [2022-11-20 12:40:20,884 INFO L231 Difference]: Finished difference. Result has 261 places, 351 transitions, 4097 flow [2022-11-20 12:40:20,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4097, PETRI_PLACES=261, PETRI_TRANSITIONS=351} [2022-11-20 12:40:20,885 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 158 predicate places. [2022-11-20 12:40:20,886 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 351 transitions, 4097 flow [2022-11-20 12:40:20,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 52.74545454545454) internal successors, (2901), 55 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:20,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:20,887 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:20,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:40:21,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1913435437, now seen corresponding path program 11 times [2022-11-20 12:40:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:21,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494942889] [2022-11-20 12:40:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:40:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494942889] [2022-11-20 12:40:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494942889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:21,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629757077] [2022-11-20 12:40:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:40:21,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:21,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:21,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:40:21,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 12:40:21,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:21,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 12:40:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:40:22,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:40:22,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629757077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:22,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:22,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2022-11-20 12:40:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282933131] [2022-11-20 12:40:22,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 12:40:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 12:40:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 12:40:22,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-20 12:40:22,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 351 transitions, 4097 flow. Second operand has 42 states, 42 states have (on average 88.30952380952381) internal successors, (3709), 42 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:22,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:22,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-20 12:40:22,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:24,683 INFO L130 PetriNetUnfolder]: 705/5025 cut-off events. [2022-11-20 12:40:24,683 INFO L131 PetriNetUnfolder]: For 31305/32723 co-relation queries the response was YES. [2022-11-20 12:40:24,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15015 conditions, 5025 events. 705/5025 cut-off events. For 31305/32723 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 58681 event pairs, 108 based on Foata normal form. 125/4646 useless extension candidates. Maximal degree in co-relation 14963. Up to 1174 conditions per place. [2022-11-20 12:40:24,752 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 272 selfloop transitions, 50 changer transitions 45/447 dead transitions. [2022-11-20 12:40:24,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 447 transitions, 5906 flow [2022-11-20 12:40:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 12:40:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 12:40:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2404 transitions. [2022-11-20 12:40:24,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7675606641123882 [2022-11-20 12:40:24,759 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2404 transitions. [2022-11-20 12:40:24,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2404 transitions. [2022-11-20 12:40:24,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:24,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2404 transitions. [2022-11-20 12:40:24,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 89.03703703703704) internal successors, (2404), 27 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:24,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:24,891 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:24,892 INFO L175 Difference]: Start difference. First operand has 261 places, 351 transitions, 4097 flow. Second operand 27 states and 2404 transitions. [2022-11-20 12:40:24,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 447 transitions, 5906 flow [2022-11-20 12:40:24,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 447 transitions, 5594 flow, removed 98 selfloop flow, removed 27 redundant places. [2022-11-20 12:40:25,000 INFO L231 Difference]: Finished difference. Result has 268 places, 369 transitions, 4242 flow [2022-11-20 12:40:25,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4242, PETRI_PLACES=268, PETRI_TRANSITIONS=369} [2022-11-20 12:40:25,002 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 165 predicate places. [2022-11-20 12:40:25,002 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 369 transitions, 4242 flow [2022-11-20 12:40:25,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 88.30952380952381) internal successors, (3709), 42 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:25,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:25,004 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:25,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:40:25,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash 436659293, now seen corresponding path program 12 times [2022-11-20 12:40:25,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:25,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872124660] [2022-11-20 12:40:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:25,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:40:25,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872124660] [2022-11-20 12:40:25,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872124660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433687454] [2022-11-20 12:40:25,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:40:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:25,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:25,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:40:25,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 12:40:25,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:25,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:40:25,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:40:26,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:40:26,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433687454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:26,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:26,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-20 12:40:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581597673] [2022-11-20 12:40:26,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:26,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:26,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:26,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-20 12:40:26,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 369 transitions, 4242 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:26,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:26,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-20 12:40:26,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:27,447 INFO L130 PetriNetUnfolder]: 863/6033 cut-off events. [2022-11-20 12:40:27,448 INFO L131 PetriNetUnfolder]: For 42242/43810 co-relation queries the response was YES. [2022-11-20 12:40:27,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18627 conditions, 6033 events. 863/6033 cut-off events. For 42242/43810 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 73475 event pairs, 107 based on Foata normal form. 127/5626 useless extension candidates. Maximal degree in co-relation 18566. Up to 767 conditions per place. [2022-11-20 12:40:27,502 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 117 selfloop transitions, 220 changer transitions 32/479 dead transitions. [2022-11-20 12:40:27,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 479 transitions, 6561 flow [2022-11-20 12:40:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:40:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:40:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-11-20 12:40:27,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-11-20 12:40:27,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-11-20 12:40:27,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-11-20 12:40:27,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:27,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-11-20 12:40:27,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:27,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:27,508 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:27,508 INFO L175 Difference]: Start difference. First operand has 268 places, 369 transitions, 4242 flow. Second operand 6 states and 639 transitions. [2022-11-20 12:40:27,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 479 transitions, 6561 flow [2022-11-20 12:40:27,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 479 transitions, 6470 flow, removed 30 selfloop flow, removed 15 redundant places. [2022-11-20 12:40:27,661 INFO L231 Difference]: Finished difference. Result has 257 places, 435 transitions, 5831 flow [2022-11-20 12:40:27,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5831, PETRI_PLACES=257, PETRI_TRANSITIONS=435} [2022-11-20 12:40:27,662 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 154 predicate places. [2022-11-20 12:40:27,662 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 435 transitions, 5831 flow [2022-11-20 12:40:27,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:27,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:27,663 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:27,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:27,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:27,869 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:27,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1784224292, now seen corresponding path program 13 times [2022-11-20 12:40:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:27,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944186812] [2022-11-20 12:40:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:40:29,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944186812] [2022-11-20 12:40:29,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944186812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302289549] [2022-11-20 12:40:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:40:29,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:29,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:29,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:40:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 12:40:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:30,721 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 19 treesize of output 21 [2022-11-20 12:40:30,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:40:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:40:30,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:31,117 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_420) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2022-11-20 12:40:31,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:40:31,139 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 47 treesize of output 37 [2022-11-20 12:40:31,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-20 12:40:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 12:40:31,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302289549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:31,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:31,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 18] total 51 [2022-11-20 12:40:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980555776] [2022-11-20 12:40:31,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 12:40:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 12:40:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2229, Unknown=1, NotChecked=96, Total=2550 [2022-11-20 12:40:31,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2022-11-20 12:40:31,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 435 transitions, 5831 flow. Second operand has 51 states, 51 states have (on average 57.78431372549019) internal successors, (2947), 51 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:31,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:31,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2022-11-20 12:40:31,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:35,457 INFO L130 PetriNetUnfolder]: 1289/7597 cut-off events. [2022-11-20 12:40:35,457 INFO L131 PetriNetUnfolder]: For 57017/57101 co-relation queries the response was YES. [2022-11-20 12:40:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25354 conditions, 7597 events. 1289/7597 cut-off events. For 57017/57101 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 95235 event pairs, 13 based on Foata normal form. 52/6973 useless extension candidates. Maximal degree in co-relation 25294. Up to 1042 conditions per place. [2022-11-20 12:40:35,550 INFO L137 encePairwiseOnDemand]: 93/116 looper letters, 179 selfloop transitions, 326 changer transitions 40/592 dead transitions. [2022-11-20 12:40:35,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 592 transitions, 8839 flow [2022-11-20 12:40:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:40:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 12:40:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2684 transitions. [2022-11-20 12:40:35,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.514176245210728 [2022-11-20 12:40:35,557 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2684 transitions. [2022-11-20 12:40:35,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2684 transitions. [2022-11-20 12:40:35,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:35,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2684 transitions. [2022-11-20 12:40:35,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.644444444444446) internal successors, (2684), 45 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:35,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 116.0) internal successors, (5336), 46 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:35,574 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 116.0) internal successors, (5336), 46 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:35,574 INFO L175 Difference]: Start difference. First operand has 257 places, 435 transitions, 5831 flow. Second operand 45 states and 2684 transitions. [2022-11-20 12:40:35,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 592 transitions, 8839 flow [2022-11-20 12:40:35,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 592 transitions, 8351 flow, removed 235 selfloop flow, removed 5 redundant places. [2022-11-20 12:40:35,861 INFO L231 Difference]: Finished difference. Result has 295 places, 441 transitions, 6567 flow [2022-11-20 12:40:35,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5628, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=6567, PETRI_PLACES=295, PETRI_TRANSITIONS=441} [2022-11-20 12:40:35,862 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 192 predicate places. [2022-11-20 12:40:35,862 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 441 transitions, 6567 flow [2022-11-20 12:40:35,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 57.78431372549019) internal successors, (2947), 51 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:35,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:35,863 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:35,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:36,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:40:36,064 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:36,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1725627940, now seen corresponding path program 14 times [2022-11-20 12:40:36,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:36,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099197828] [2022-11-20 12:40:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:40:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099197828] [2022-11-20 12:40:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099197828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740688940] [2022-11-20 12:40:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:40:37,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:37,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:37,511 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:37,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:40:37,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:40:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 12:40:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:38,838 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 19 treesize of output 21 [2022-11-20 12:40:38,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:40:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:40:38,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:39,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:40:39,208 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 47 treesize of output 37 [2022-11-20 12:40:39,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-20 12:40:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:40:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740688940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:39,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:39,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 18] total 53 [2022-11-20 12:40:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174480017] [2022-11-20 12:40:39,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 12:40:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 12:40:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2530, Unknown=2, NotChecked=0, Total=2756 [2022-11-20 12:40:39,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2022-11-20 12:40:39,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 441 transitions, 6567 flow. Second operand has 53 states, 53 states have (on average 57.77358490566038) internal successors, (3062), 53 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:39,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:39,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2022-11-20 12:40:39,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:44,377 INFO L130 PetriNetUnfolder]: 1400/8184 cut-off events. [2022-11-20 12:40:44,378 INFO L131 PetriNetUnfolder]: For 64444/64613 co-relation queries the response was YES. [2022-11-20 12:40:44,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27802 conditions, 8184 events. 1400/8184 cut-off events. For 64444/64613 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 103572 event pairs, 2 based on Foata normal form. 53/7515 useless extension candidates. Maximal degree in co-relation 27739. Up to 1138 conditions per place. [2022-11-20 12:40:44,464 INFO L137 encePairwiseOnDemand]: 92/116 looper letters, 152 selfloop transitions, 365 changer transitions 45/609 dead transitions. [2022-11-20 12:40:44,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 609 transitions, 9748 flow [2022-11-20 12:40:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 12:40:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-20 12:40:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2553 transitions. [2022-11-20 12:40:44,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5118283881315157 [2022-11-20 12:40:44,470 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2553 transitions. [2022-11-20 12:40:44,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2553 transitions. [2022-11-20 12:40:44,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:44,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2553 transitions. [2022-11-20 12:40:44,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 59.372093023255815) internal successors, (2553), 43 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:44,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 116.0) internal successors, (5104), 44 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:44,486 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 116.0) internal successors, (5104), 44 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:44,486 INFO L175 Difference]: Start difference. First operand has 295 places, 441 transitions, 6567 flow. Second operand 43 states and 2553 transitions. [2022-11-20 12:40:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 609 transitions, 9748 flow [2022-11-20 12:40:44,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 609 transitions, 9290 flow, removed 16 selfloop flow, removed 38 redundant places. [2022-11-20 12:40:44,798 INFO L231 Difference]: Finished difference. Result has 303 places, 481 transitions, 7761 flow [2022-11-20 12:40:44,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7761, PETRI_PLACES=303, PETRI_TRANSITIONS=481} [2022-11-20 12:40:44,799 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 200 predicate places. [2022-11-20 12:40:44,799 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 481 transitions, 7761 flow [2022-11-20 12:40:44,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 57.77358490566038) internal successors, (3062), 53 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:44,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:44,801 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:44,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:40:45,011 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 356667292, now seen corresponding path program 15 times [2022-11-20 12:40:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659851728] [2022-11-20 12:40:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:46,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659851728] [2022-11-20 12:40:46,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659851728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524341233] [2022-11-20 12:40:46,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:40:46,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:46,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:46,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:40:46,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 12:40:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 12:40:46,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:47,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:40:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:40:47,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:47,422 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 12:40:47,422 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 28 treesize of output 13 [2022-11-20 12:40:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:40:47,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524341233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:47,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:47,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 13] total 38 [2022-11-20 12:40:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526287834] [2022-11-20 12:40:47,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:47,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:40:47,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:40:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:40:47,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-20 12:40:47,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 481 transitions, 7761 flow. Second operand has 38 states, 38 states have (on average 63.1578947368421) internal successors, (2400), 38 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:47,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:47,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-20 12:40:47,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:40:53,688 INFO L130 PetriNetUnfolder]: 1645/8990 cut-off events. [2022-11-20 12:40:53,688 INFO L131 PetriNetUnfolder]: For 94509/94804 co-relation queries the response was YES. [2022-11-20 12:40:53,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35318 conditions, 8990 events. 1645/8990 cut-off events. For 94509/94804 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 113885 event pairs, 0 based on Foata normal form. 77/8325 useless extension candidates. Maximal degree in co-relation 35252. Up to 1335 conditions per place. [2022-11-20 12:40:53,773 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 275 selfloop transitions, 465 changer transitions 183/973 dead transitions. [2022-11-20 12:40:53,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 973 transitions, 15731 flow [2022-11-20 12:40:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-20 12:40:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-11-20 12:40:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 7482 transitions. [2022-11-20 12:40:53,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5560344827586207 [2022-11-20 12:40:53,783 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 7482 transitions. [2022-11-20 12:40:53,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 7482 transitions. [2022-11-20 12:40:53,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:40:53,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 7482 transitions. [2022-11-20 12:40:53,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 64.5) internal successors, (7482), 116 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:53,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 116.0) internal successors, (13572), 117 states have internal predecessors, (13572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:53,814 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 116.0) internal successors, (13572), 117 states have internal predecessors, (13572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:53,814 INFO L175 Difference]: Start difference. First operand has 303 places, 481 transitions, 7761 flow. Second operand 116 states and 7482 transitions. [2022-11-20 12:40:53,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 973 transitions, 15731 flow [2022-11-20 12:40:54,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 973 transitions, 15055 flow, removed 191 selfloop flow, removed 33 redundant places. [2022-11-20 12:40:54,064 INFO L231 Difference]: Finished difference. Result has 431 places, 571 transitions, 10536 flow [2022-11-20 12:40:54,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=7388, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=10536, PETRI_PLACES=431, PETRI_TRANSITIONS=571} [2022-11-20 12:40:54,065 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 328 predicate places. [2022-11-20 12:40:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 571 transitions, 10536 flow [2022-11-20 12:40:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 63.1578947368421) internal successors, (2400), 38 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:54,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:40:54,066 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:54,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:54,267 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:40:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1164111540, now seen corresponding path program 16 times [2022-11-20 12:40:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415598098] [2022-11-20 12:40:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:56,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415598098] [2022-11-20 12:40:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415598098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621529263] [2022-11-20 12:40:56,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:40:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:56,435 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:56,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:40:56,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:40:56,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:40:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 12:40:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:57,795 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 19 treesize of output 21 [2022-11-20 12:40:58,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:40:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:40:58,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:58,253 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_530 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_530) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2022-11-20 12:40:58,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:40:58,264 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 47 treesize of output 37 [2022-11-20 12:40:58,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-20 12:40:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:40:59,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621529263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:59,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:59,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 20] total 67 [2022-11-20 12:40:59,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235878558] [2022-11-20 12:40:59,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:59,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 12:40:59,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 12:40:59,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=4008, Unknown=1, NotChecked=128, Total=4422 [2022-11-20 12:40:59,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2022-11-20 12:40:59,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 571 transitions, 10536 flow. Second operand has 67 states, 67 states have (on average 49.74626865671642) internal successors, (3333), 67 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:40:59,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:40:59,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2022-11-20 12:40:59,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:41:08,159 INFO L130 PetriNetUnfolder]: 2631/14121 cut-off events. [2022-11-20 12:41:08,159 INFO L131 PetriNetUnfolder]: For 179841/180590 co-relation queries the response was YES. [2022-11-20 12:41:08,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58791 conditions, 14121 events. 2631/14121 cut-off events. For 179841/180590 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 193633 event pairs, 0 based on Foata normal form. 137/13074 useless extension candidates. Maximal degree in co-relation 58680. Up to 2140 conditions per place. [2022-11-20 12:41:08,448 INFO L137 encePairwiseOnDemand]: 91/116 looper letters, 157 selfloop transitions, 765 changer transitions 55/1017 dead transitions. [2022-11-20 12:41:08,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1017 transitions, 21109 flow [2022-11-20 12:41:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 12:41:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-20 12:41:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2981 transitions. [2022-11-20 12:41:08,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44307372175980975 [2022-11-20 12:41:08,453 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2981 transitions. [2022-11-20 12:41:08,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2981 transitions. [2022-11-20 12:41:08,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:41:08,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2981 transitions. [2022-11-20 12:41:08,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 51.39655172413793) internal successors, (2981), 58 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:08,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 116.0) internal successors, (6844), 59 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:08,467 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 116.0) internal successors, (6844), 59 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:08,467 INFO L175 Difference]: Start difference. First operand has 431 places, 571 transitions, 10536 flow. Second operand 58 states and 2981 transitions. [2022-11-20 12:41:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1017 transitions, 21109 flow [2022-11-20 12:41:09,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1017 transitions, 19177 flow, removed 308 selfloop flow, removed 79 redundant places. [2022-11-20 12:41:09,234 INFO L231 Difference]: Finished difference. Result has 384 places, 868 transitions, 17461 flow [2022-11-20 12:41:09,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=9106, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=17461, PETRI_PLACES=384, PETRI_TRANSITIONS=868} [2022-11-20 12:41:09,235 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 281 predicate places. [2022-11-20 12:41:09,235 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 868 transitions, 17461 flow [2022-11-20 12:41:09,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 49.74626865671642) internal successors, (3333), 67 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:09,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:41:09,236 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:09,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 12:41:09,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:09,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:41:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:09,442 INFO L85 PathProgramCache]: Analyzing trace with hash -540352056, now seen corresponding path program 17 times [2022-11-20 12:41:09,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:09,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953727016] [2022-11-20 12:41:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:09,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 12:41:09,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953727016] [2022-11-20 12:41:09,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953727016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332831970] [2022-11-20 12:41:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:41:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:09,626 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:09,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:41:09,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 12:41:09,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:41:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:41:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 12:41:09,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:41:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 12:41:10,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332831970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:41:10,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:41:10,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-11-20 12:41:10,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659262205] [2022-11-20 12:41:10,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:41:10,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:41:10,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:41:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:41:10,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-20 12:41:10,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 868 transitions, 17461 flow. Second operand has 8 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:10,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:41:10,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-20 12:41:10,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:41:14,728 INFO L130 PetriNetUnfolder]: 2462/15018 cut-off events. [2022-11-20 12:41:14,728 INFO L131 PetriNetUnfolder]: For 244882/252002 co-relation queries the response was YES. [2022-11-20 12:41:14,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65132 conditions, 15018 events. 2462/15018 cut-off events. For 244882/252002 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 216383 event pairs, 240 based on Foata normal form. 331/14000 useless extension candidates. Maximal degree in co-relation 65054. Up to 2538 conditions per place. [2022-11-20 12:41:14,969 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 281 selfloop transitions, 635 changer transitions 46/1079 dead transitions. [2022-11-20 12:41:14,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1079 transitions, 23647 flow [2022-11-20 12:41:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:41:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:41:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 746 transitions. [2022-11-20 12:41:14,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9187192118226601 [2022-11-20 12:41:14,972 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 746 transitions. [2022-11-20 12:41:14,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 746 transitions. [2022-11-20 12:41:14,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:41:14,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 746 transitions. [2022-11-20 12:41:14,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.57142857142857) internal successors, (746), 7 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:14,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 116.0) internal successors, (928), 8 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:14,974 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 116.0) internal successors, (928), 8 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:14,974 INFO L175 Difference]: Start difference. First operand has 384 places, 868 transitions, 17461 flow. Second operand 7 states and 746 transitions. [2022-11-20 12:41:14,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1079 transitions, 23647 flow [2022-11-20 12:41:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1079 transitions, 22322 flow, removed 285 selfloop flow, removed 38 redundant places. [2022-11-20 12:41:15,731 INFO L231 Difference]: Finished difference. Result has 351 places, 1018 transitions, 20890 flow [2022-11-20 12:41:15,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=16359, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20890, PETRI_PLACES=351, PETRI_TRANSITIONS=1018} [2022-11-20 12:41:15,732 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 248 predicate places. [2022-11-20 12:41:15,733 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1018 transitions, 20890 flow [2022-11-20 12:41:15,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:15,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:41:15,733 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:15,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:15,934 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:41:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1943502058, now seen corresponding path program 18 times [2022-11-20 12:41:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:15,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628590914] [2022-11-20 12:41:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 32 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:41:16,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628590914] [2022-11-20 12:41:16,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628590914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948907472] [2022-11-20 12:41:16,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:41:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:16,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:16,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:41:17,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 12:41:17,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:41:17,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:41:17,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 53 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:41:17,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:41:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 41 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:41:18,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948907472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:41:18,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:41:18,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2022-11-20 12:41:18,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021333626] [2022-11-20 12:41:18,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:41:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 12:41:18,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 12:41:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2664, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 12:41:18,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-20 12:41:18,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1018 transitions, 20890 flow. Second operand has 58 states, 58 states have (on average 88.10344827586206) internal successors, (5110), 58 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:18,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:41:18,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-20 12:41:18,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:41:26,020 INFO L130 PetriNetUnfolder]: 2572/17633 cut-off events. [2022-11-20 12:41:26,020 INFO L131 PetriNetUnfolder]: For 267853/274705 co-relation queries the response was YES. [2022-11-20 12:41:26,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71900 conditions, 17633 events. 2572/17633 cut-off events. For 267853/274705 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 259674 event pairs, 413 based on Foata normal form. 306/16174 useless extension candidates. Maximal degree in co-relation 71824. Up to 4666 conditions per place. [2022-11-20 12:41:26,265 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 900 selfloop transitions, 45 changer transitions 203/1235 dead transitions. [2022-11-20 12:41:26,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1235 transitions, 26815 flow [2022-11-20 12:41:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 12:41:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 12:41:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3475 transitions. [2022-11-20 12:41:26,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7681255526083113 [2022-11-20 12:41:26,268 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3475 transitions. [2022-11-20 12:41:26,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3475 transitions. [2022-11-20 12:41:26,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:41:26,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3475 transitions. [2022-11-20 12:41:26,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 89.1025641025641) internal successors, (3475), 39 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:26,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 116.0) internal successors, (4640), 40 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:26,279 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 116.0) internal successors, (4640), 40 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:26,279 INFO L175 Difference]: Start difference. First operand has 351 places, 1018 transitions, 20890 flow. Second operand 39 states and 3475 transitions. [2022-11-20 12:41:26,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1235 transitions, 26815 flow [2022-11-20 12:41:27,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1235 transitions, 26271 flow, removed 272 selfloop flow, removed 0 redundant places. [2022-11-20 12:41:27,447 INFO L231 Difference]: Finished difference. Result has 407 places, 1022 transitions, 20900 flow [2022-11-20 12:41:27,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=20388, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=20900, PETRI_PLACES=407, PETRI_TRANSITIONS=1022} [2022-11-20 12:41:27,448 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 304 predicate places. [2022-11-20 12:41:27,448 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1022 transitions, 20900 flow [2022-11-20 12:41:27,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 88.10344827586206) internal successors, (5110), 58 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:27,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:41:27,450 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:27,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:27,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:41:27,651 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:41:27,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:27,651 INFO L85 PathProgramCache]: Analyzing trace with hash -153537957, now seen corresponding path program 19 times [2022-11-20 12:41:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:27,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18530738] [2022-11-20 12:41:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:27,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:29,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18530738] [2022-11-20 12:41:29,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18530738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044644801] [2022-11-20 12:41:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:41:29,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:29,021 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:29,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:41:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 12:41:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:30,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:41:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:41:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:41:30,372 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 12:41:30,373 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 28 treesize of output 13 [2022-11-20 12:41:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-20 12:41:30,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044644801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:41:30,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:41:30,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 15] total 57 [2022-11-20 12:41:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657499141] [2022-11-20 12:41:30,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:41:30,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 12:41:30,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 12:41:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 12:41:30,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-20 12:41:30,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1022 transitions, 20900 flow. Second operand has 57 states, 57 states have (on average 62.85964912280702) internal successors, (3583), 57 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:30,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:41:30,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-20 12:41:30,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:41:45,569 INFO L130 PetriNetUnfolder]: 4052/21504 cut-off events. [2022-11-20 12:41:45,570 INFO L131 PetriNetUnfolder]: For 329757/330181 co-relation queries the response was YES. [2022-11-20 12:41:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94785 conditions, 21504 events. 4052/21504 cut-off events. For 329757/330181 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 313125 event pairs, 0 based on Foata normal form. 143/19866 useless extension candidates. Maximal degree in co-relation 94689. Up to 3290 conditions per place. [2022-11-20 12:41:45,960 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 390 selfloop transitions, 1099 changer transitions 268/1807 dead transitions. [2022-11-20 12:41:45,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1807 transitions, 36146 flow [2022-11-20 12:41:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-11-20 12:41:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2022-11-20 12:41:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 10216 transitions. [2022-11-20 12:41:45,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5573985159319075 [2022-11-20 12:41:45,973 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 10216 transitions. [2022-11-20 12:41:45,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 10216 transitions. [2022-11-20 12:41:45,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:41:45,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 10216 transitions. [2022-11-20 12:41:45,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 64.65822784810126) internal successors, (10216), 158 states have internal predecessors, (10216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:46,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 116.0) internal successors, (18444), 159 states have internal predecessors, (18444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:46,010 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 116.0) internal successors, (18444), 159 states have internal predecessors, (18444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:46,010 INFO L175 Difference]: Start difference. First operand has 407 places, 1022 transitions, 20900 flow. Second operand 158 states and 10216 transitions. [2022-11-20 12:41:46,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1807 transitions, 36146 flow [2022-11-20 12:41:47,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1807 transitions, 35649 flow, removed 221 selfloop flow, removed 31 redundant places. [2022-11-20 12:41:47,681 INFO L231 Difference]: Finished difference. Result has 577 places, 1212 transitions, 28021 flow [2022-11-20 12:41:47,681 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=20462, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=28021, PETRI_PLACES=577, PETRI_TRANSITIONS=1212} [2022-11-20 12:41:47,682 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 474 predicate places. [2022-11-20 12:41:47,682 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 1212 transitions, 28021 flow [2022-11-20 12:41:47,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 62.85964912280702) internal successors, (3583), 57 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:47,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:41:47,683 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:47,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:47,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 12:41:47,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:41:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -330654091, now seen corresponding path program 20 times [2022-11-20 12:41:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420666409] [2022-11-20 12:41:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:47,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:49,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420666409] [2022-11-20 12:41:49,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420666409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:49,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677603196] [2022-11-20 12:41:49,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:41:49,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:49,608 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:49,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443162db-8fd1-476e-a00e-c5d4d49eb00f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:41:49,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:41:49,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:41:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 12:41:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:50,953 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 13 treesize of output 9 [2022-11-20 12:41:51,226 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 [2022-11-20 12:41:51,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:51,623 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 19 treesize of output 21 [2022-11-20 12:41:51,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:41:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:51,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:41:52,227 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_686) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)) 5)) is different from false [2022-11-20 12:41:52,842 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_685 (Array Int Int)) (v_ArrVal_686 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_685)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_686) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ .cse1 16 |c_ULTIMATE.start_main_#t~ret9#1.offset|))) (not (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~size~0 4) .cse1 16 |c_ULTIMATE.start_main_#t~ret9#1.offset|)) 5))))) is different from false [2022-11-20 12:41:52,991 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_685 (Array Int Int)) (v_ArrVal_686 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_685)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_686) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) is different from false [2022-11-20 12:41:53,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:41:53,047 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 62 treesize of output 50 [2022-11-20 12:41:53,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:41:53,063 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 194 treesize of output 174 [2022-11-20 12:41:53,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2022-11-20 12:41:53,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:41:53,081 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 136 treesize of output 122 [2022-11-20 12:41:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 54 trivial. 21 not checked. [2022-11-20 12:41:53,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677603196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:41:53,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:41:53,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 24] total 78 [2022-11-20 12:41:53,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204890279] [2022-11-20 12:41:53,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:41:53,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-20 12:41:53,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:53,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-20 12:41:53,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=5202, Unknown=7, NotChecked=444, Total=6006 [2022-11-20 12:41:53,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 116 [2022-11-20 12:41:53,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 1212 transitions, 28021 flow. Second operand has 78 states, 78 states have (on average 55.46153846153846) internal successors, (4326), 78 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:41:53,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:41:53,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 116 [2022-11-20 12:41:53,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:41:59,224 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (and (= (select .cse0 (+ .cse1 4)) 5) (= (select .cse0 (+ c_~queue~0.offset .cse1)) 5) (= c_~queue~0.offset 0) (= 5 c_~x~0) (forall ((v_ArrVal_686 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_686) c_~queue~0.base) (+ c_~queue~0.offset .cse1 16)) 5)))) is different from false