./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:39,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:39,752 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:39:39,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:39,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:39,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:39,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:39,784 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:39,785 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:39,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:39,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:39,786 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:39,787 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:39,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:39,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:39:39,789 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:39,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:39,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:39,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:39,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:39:39,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:39,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:39:39,796 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:39,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:39:39,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:39,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:39,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:39,800 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:39,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:39,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:39,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:39,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:39:39,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:39,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:39,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:39,803 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:39:39,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:39,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:39,804 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:39,804 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2023-11-19 07:39:40,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:40,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:40,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:40,134 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:40,135 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:40,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2023-11-19 07:39:43,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:43,484 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:43,485 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2023-11-19 07:39:43,494 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/data/45e6e1dd4/e072715a290e4d9fba52cc62bb1876bc/FLAG91b96400a [2023-11-19 07:39:43,511 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/data/45e6e1dd4/e072715a290e4d9fba52cc62bb1876bc [2023-11-19 07:39:43,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:43,515 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:43,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:43,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:43,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:43,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c322cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43, skipping insertion in model container [2023-11-19 07:39:43,526 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,553 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:43,797 WARN L240 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_44650e75-248e-447b-a28f-be49e106eb81/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2638,2651] [2023-11-19 07:39:43,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:43,827 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:43,860 WARN L240 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_44650e75-248e-447b-a28f-be49e106eb81/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2638,2651] [2023-11-19 07:39:43,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:43,875 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:43,875 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:39:43,884 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:43,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43 WrapperNode [2023-11-19 07:39:43,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:43,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:43,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:43,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:43,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,947 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 282 [2023-11-19 07:39:43,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:43,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:43,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:43,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:43,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:43,998 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:44,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:44,003 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:44,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:44,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:44,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:44,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:44,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (1/1) ... [2023-11-19 07:39:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:44,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:44,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:39:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:39:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:39:44,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:39:44,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:39:44,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:39:44,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:39:44,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:39:44,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:39:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:39:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:39:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:39:44,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:44,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:44,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:39:44,106 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:39:44,228 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:44,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:44,830 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:45,155 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:45,156 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 07:39:45,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:45 BoogieIcfgContainer [2023-11-19 07:39:45,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:45,172 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:45,172 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:45,176 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:45,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:43" (1/3) ... [2023-11-19 07:39:45,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c40cf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:45, skipping insertion in model container [2023-11-19 07:39:45,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:43" (2/3) ... [2023-11-19 07:39:45,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c40cf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:45, skipping insertion in model container [2023-11-19 07:39:45,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:45" (3/3) ... [2023-11-19 07:39:45,179 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-11-19 07:39:45,189 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:39:45,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:45,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:45,202 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:39:45,273 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:39:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 423 flow [2023-11-19 07:39:45,405 INFO L124 PetriNetUnfolderBase]: 16/198 cut-off events. [2023-11-19 07:39:45,405 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:39:45,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 16/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 123 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-11-19 07:39:45,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 423 flow [2023-11-19 07:39:45,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 187 transitions, 392 flow [2023-11-19 07:39:45,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:39:45,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 187 transitions, 392 flow [2023-11-19 07:39:45,435 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 187 transitions, 392 flow [2023-11-19 07:39:45,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 187 transitions, 392 flow [2023-11-19 07:39:45,484 INFO L124 PetriNetUnfolderBase]: 16/187 cut-off events. [2023-11-19 07:39:45,484 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:39:45,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 187 events. 16/187 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 122 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-11-19 07:39:45,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-19 07:39:53,632 INFO L134 LiptonReduction]: Checked pairs total: 1777 [2023-11-19 07:39:53,633 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-19 07:39:53,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:53,656 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=LoopHeads, 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;@6f5e8566, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:53,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:39:53,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:39:53,666 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-11-19 07:39:53,667 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:39:53,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:53,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:53,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:39:53,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2126087412, now seen corresponding path program 1 times [2023-11-19 07:39:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:53,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628490334] [2023-11-19 07:39:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:53,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:54,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628490334] [2023-11-19 07:39:54,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628490334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:54,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:54,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449059304] [2023-11-19 07:39:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:54,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:54,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:54,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 399 [2023-11-19 07:39:54,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:54,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:54,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 399 [2023-11-19 07:39:54,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:54,517 INFO L124 PetriNetUnfolderBase]: 430/634 cut-off events. [2023-11-19 07:39:54,518 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-19 07:39:54,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 634 events. 430/634 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2008 event pairs, 138 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-19 07:39:54,533 INFO L140 encePairwiseOnDemand]: 394/399 looper letters, 40 selfloop transitions, 4 changer transitions 1/45 dead transitions. [2023-11-19 07:39:54,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 213 flow [2023-11-19 07:39:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2023-11-19 07:39:54,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48454469507101083 [2023-11-19 07:39:54,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2023-11-19 07:39:54,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2023-11-19 07:39:54,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:54,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2023-11-19 07:39:54,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 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) [2023-11-19 07:39:54,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:54,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:54,590 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 3 states and 580 transitions. [2023-11-19 07:39:54,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 213 flow [2023-11-19 07:39:54,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:39:54,599 INFO L231 Difference]: Finished difference. Result has 28 places, 29 transitions, 84 flow [2023-11-19 07:39:54,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=29} [2023-11-19 07:39:54,606 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-19 07:39:54,606 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 29 transitions, 84 flow [2023-11-19 07:39:54,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:54,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:54,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:39:54,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:39:54,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash 448120032, now seen corresponding path program 1 times [2023-11-19 07:39:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:54,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344612984] [2023-11-19 07:39:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:54,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:54,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:54,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344612984] [2023-11-19 07:39:54,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344612984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:54,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:54,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:54,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930181289] [2023-11-19 07:39:54,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:54,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:54,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:54,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 399 [2023-11-19 07:39:54,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:54,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:54,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 399 [2023-11-19 07:39:54,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:55,165 INFO L124 PetriNetUnfolderBase]: 430/637 cut-off events. [2023-11-19 07:39:55,165 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-11-19 07:39:55,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549 conditions, 637 events. 430/637 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1875 event pairs, 276 based on Foata normal form. 1/635 useless extension candidates. Maximal degree in co-relation 533. Up to 635 conditions per place. [2023-11-19 07:39:55,171 INFO L140 encePairwiseOnDemand]: 394/399 looper letters, 27 selfloop transitions, 4 changer transitions 1/32 dead transitions. [2023-11-19 07:39:55,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 154 flow [2023-11-19 07:39:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:39:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 696 transitions. [2023-11-19 07:39:55,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43609022556390975 [2023-11-19 07:39:55,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 696 transitions. [2023-11-19 07:39:55,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 696 transitions. [2023-11-19 07:39:55,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:55,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 696 transitions. [2023-11-19 07:39:55,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2023-11-19 07:39:55,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,185 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 84 flow. Second operand 4 states and 696 transitions. [2023-11-19 07:39:55,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 154 flow [2023-11-19 07:39:55,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:55,188 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 106 flow [2023-11-19 07:39:55,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-19 07:39:55,189 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-11-19 07:39:55,189 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 106 flow [2023-11-19 07:39:55,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:55,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:55,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:39:55,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:39:55,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1001446141, now seen corresponding path program 1 times [2023-11-19 07:39:55,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:55,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545226717] [2023-11-19 07:39:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:39:55,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545226717] [2023-11-19 07:39:55,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545226717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:55,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:55,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:39:55,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319129642] [2023-11-19 07:39:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:55,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:55,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 399 [2023-11-19 07:39:55,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 399 [2023-11-19 07:39:55,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:55,560 INFO L124 PetriNetUnfolderBase]: 425/628 cut-off events. [2023-11-19 07:39:55,560 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-11-19 07:39:55,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 628 events. 425/628 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1928 event pairs, 186 based on Foata normal form. 50/677 useless extension candidates. Maximal degree in co-relation 1462. Up to 459 conditions per place. [2023-11-19 07:39:55,565 INFO L140 encePairwiseOnDemand]: 395/399 looper letters, 41 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-19 07:39:55,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 236 flow [2023-11-19 07:39:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:39:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 723 transitions. [2023-11-19 07:39:55,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45300751879699247 [2023-11-19 07:39:55,571 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 723 transitions. [2023-11-19 07:39:55,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 723 transitions. [2023-11-19 07:39:55,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:55,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 723 transitions. [2023-11-19 07:39:55,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,580 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 106 flow. Second operand 4 states and 723 transitions. [2023-11-19 07:39:55,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 236 flow [2023-11-19 07:39:55,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 226 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:55,584 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 115 flow [2023-11-19 07:39:55,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2023-11-19 07:39:55,585 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-19 07:39:55,585 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 115 flow [2023-11-19 07:39:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:55,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:55,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:55,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:39:55,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:39:55,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1412313319, now seen corresponding path program 1 times [2023-11-19 07:39:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:55,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320873751] [2023-11-19 07:39:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:55,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:55,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320873751] [2023-11-19 07:39:55,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320873751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:55,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510153769] [2023-11-19 07:39:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:55,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:55,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:55,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:56,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510153769] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:56,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:56,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-19 07:39:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509702004] [2023-11-19 07:39:56,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:39:56,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:39:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:39:56,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 399 [2023-11-19 07:39:56,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:56,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 399 [2023-11-19 07:39:56,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:56,479 INFO L124 PetriNetUnfolderBase]: 411/602 cut-off events. [2023-11-19 07:39:56,480 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-11-19 07:39:56,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 602 events. 411/602 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1800 event pairs, 183 based on Foata normal form. 44/645 useless extension candidates. Maximal degree in co-relation 1603. Up to 455 conditions per place. [2023-11-19 07:39:56,485 INFO L140 encePairwiseOnDemand]: 394/399 looper letters, 42 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-19 07:39:56,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 266 flow [2023-11-19 07:39:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:39:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:39:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 825 transitions. [2023-11-19 07:39:56,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2023-11-19 07:39:56,490 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 825 transitions. [2023-11-19 07:39:56,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 825 transitions. [2023-11-19 07:39:56,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:56,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 825 transitions. [2023-11-19 07:39:56,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,502 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 115 flow. Second operand 5 states and 825 transitions. [2023-11-19 07:39:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 266 flow [2023-11-19 07:39:56,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 250 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:56,509 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 127 flow [2023-11-19 07:39:56,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-11-19 07:39:56,511 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-19 07:39:56,515 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 127 flow [2023-11-19 07:39:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:56,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:56,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:56,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:39:56,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:56,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:39:56,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash -99673141, now seen corresponding path program 1 times [2023-11-19 07:39:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:56,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479683153] [2023-11-19 07:39:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:56,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:58,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479683153] [2023-11-19 07:39:58,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479683153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052876258] [2023-11-19 07:39:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:58,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:58,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:39:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:59,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-19 07:39:59,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:59,583 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:39:59,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-19 07:39:59,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:39:59,826 INFO L378 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 27 treesize of output 19 [2023-11-19 07:39:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:59,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:59,948 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_133)) (.cse1 (* 4 c_~M~0))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)))) c_~res1~0)) is different from false [2023-11-19 07:40:00,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:00,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 166 [2023-11-19 07:40:00,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:00,071 INFO L378 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 90 treesize of output 74 [2023-11-19 07:40:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052876258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:01,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-11-19 07:40:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276918542] [2023-11-19 07:40:01,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 07:40:01,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 07:40:01,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=669, Unknown=1, NotChecked=52, Total=812 [2023-11-19 07:40:01,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 399 [2023-11-19 07:40:01,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 127 flow. Second operand has 29 states, 29 states have (on average 101.10344827586206) internal successors, (2932), 29 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:01,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:01,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 399 [2023-11-19 07:40:01,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:03,840 INFO L124 PetriNetUnfolderBase]: 838/1232 cut-off events. [2023-11-19 07:40:03,840 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2023-11-19 07:40:03,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1232 events. 838/1232 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4447 event pairs, 100 based on Foata normal form. 2/1229 useless extension candidates. Maximal degree in co-relation 3091. Up to 673 conditions per place. [2023-11-19 07:40:03,852 INFO L140 encePairwiseOnDemand]: 386/399 looper letters, 95 selfloop transitions, 36 changer transitions 4/135 dead transitions. [2023-11-19 07:40:03,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 135 transitions, 719 flow [2023-11-19 07:40:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:40:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:40:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1719 transitions. [2023-11-19 07:40:03,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2692669172932331 [2023-11-19 07:40:03,861 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1719 transitions. [2023-11-19 07:40:03,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1719 transitions. [2023-11-19 07:40:03,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:03,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1719 transitions. [2023-11-19 07:40:03,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.4375) internal successors, (1719), 16 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,884 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 399.0) internal successors, (6783), 17 states have internal predecessors, (6783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,885 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 127 flow. Second operand 16 states and 1719 transitions. [2023-11-19 07:40:03,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 135 transitions, 719 flow [2023-11-19 07:40:03,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 135 transitions, 703 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:03,893 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 371 flow [2023-11-19 07:40:03,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=371, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2023-11-19 07:40:03,896 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 25 predicate places. [2023-11-19 07:40:03,896 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 371 flow [2023-11-19 07:40:03,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.10344827586206) internal successors, (2932), 29 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:03,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:03,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:03,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:04,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:40:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1514525927, now seen corresponding path program 2 times [2023-11-19 07:40:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925169332] [2023-11-19 07:40:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:05,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925169332] [2023-11-19 07:40:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925169332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244938642] [2023-11-19 07:40:05,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:05,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:05,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:05,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:05,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:05,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:40:05,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:06,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:06,176 INFO L378 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 27 treesize of output 19 [2023-11-19 07:40:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:06,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:06,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:06,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-19 07:40:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:06,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244938642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:06,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:06,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2023-11-19 07:40:06,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6110674] [2023-11-19 07:40:06,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:06,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:40:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:06,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:40:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:40:09,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 399 [2023-11-19 07:40:09,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 371 flow. Second operand has 27 states, 27 states have (on average 132.55555555555554) internal successors, (3579), 27 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:09,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:09,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 399 [2023-11-19 07:40:09,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:11,242 INFO L124 PetriNetUnfolderBase]: 1235/1800 cut-off events. [2023-11-19 07:40:11,242 INFO L125 PetriNetUnfolderBase]: For 2085/2085 co-relation queries the response was YES. [2023-11-19 07:40:11,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6174 conditions, 1800 events. 1235/1800 cut-off events. For 2085/2085 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6883 event pairs, 234 based on Foata normal form. 1/1800 useless extension candidates. Maximal degree in co-relation 5918. Up to 1213 conditions per place. [2023-11-19 07:40:11,261 INFO L140 encePairwiseOnDemand]: 387/399 looper letters, 109 selfloop transitions, 52 changer transitions 1/162 dead transitions. [2023-11-19 07:40:11,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 162 transitions, 1095 flow [2023-11-19 07:40:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:40:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:40:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2607 transitions. [2023-11-19 07:40:11,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34388603086664027 [2023-11-19 07:40:11,273 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2607 transitions. [2023-11-19 07:40:11,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2607 transitions. [2023-11-19 07:40:11,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:11,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2607 transitions. [2023-11-19 07:40:11,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.21052631578948) internal successors, (2607), 19 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 399.0) internal successors, (7980), 20 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,301 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 399.0) internal successors, (7980), 20 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,301 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 371 flow. Second operand 19 states and 2607 transitions. [2023-11-19 07:40:11,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 162 transitions, 1095 flow [2023-11-19 07:40:11,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 162 transitions, 1010 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:11,313 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 692 flow [2023-11-19 07:40:11,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=692, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2023-11-19 07:40:11,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2023-11-19 07:40:11,315 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 692 flow [2023-11-19 07:40:11,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 132.55555555555554) internal successors, (3579), 27 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:11,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:11,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:11,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:11,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:11,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:40:11,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1398884419, now seen corresponding path program 3 times [2023-11-19 07:40:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:11,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932391998] [2023-11-19 07:40:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:11,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932391998] [2023-11-19 07:40:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932391998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056129261] [2023-11-19 07:40:12,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:40:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:12,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:12,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:13,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:40:13,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:13,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:40:13,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:13,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:13,471 INFO L378 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 27 treesize of output 19 [2023-11-19 07:40:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:13,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:13,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:13,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-19 07:40:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:13,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056129261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:13,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:13,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2023-11-19 07:40:13,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902330161] [2023-11-19 07:40:13,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 07:40:13,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:40:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:40:16,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 399 [2023-11-19 07:40:16,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 692 flow. Second operand has 26 states, 26 states have (on average 132.26923076923077) internal successors, (3439), 26 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:16,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:16,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 399 [2023-11-19 07:40:16,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:17,750 INFO L124 PetriNetUnfolderBase]: 1413/2055 cut-off events. [2023-11-19 07:40:17,750 INFO L125 PetriNetUnfolderBase]: For 3957/3957 co-relation queries the response was YES. [2023-11-19 07:40:17,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8131 conditions, 2055 events. 1413/2055 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8055 event pairs, 280 based on Foata normal form. 1/2056 useless extension candidates. Maximal degree in co-relation 7896. Up to 1572 conditions per place. [2023-11-19 07:40:17,781 INFO L140 encePairwiseOnDemand]: 387/399 looper letters, 125 selfloop transitions, 58 changer transitions 1/184 dead transitions. [2023-11-19 07:40:17,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 184 transitions, 1441 flow [2023-11-19 07:40:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:40:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:40:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2741 transitions. [2023-11-19 07:40:17,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34348370927318295 [2023-11-19 07:40:17,793 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2741 transitions. [2023-11-19 07:40:17,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2741 transitions. [2023-11-19 07:40:17,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:17,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2741 transitions. [2023-11-19 07:40:17,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 137.05) internal successors, (2741), 20 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 399.0) internal successors, (8379), 21 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,821 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 399.0) internal successors, (8379), 21 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,821 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 692 flow. Second operand 20 states and 2741 transitions. [2023-11-19 07:40:17,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 184 transitions, 1441 flow [2023-11-19 07:40:17,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 184 transitions, 1367 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-11-19 07:40:17,846 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 990 flow [2023-11-19 07:40:17,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=990, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2023-11-19 07:40:17,848 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-11-19 07:40:17,848 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 990 flow [2023-11-19 07:40:17,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 132.26923076923077) internal successors, (3439), 26 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:17,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:17,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:17,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:18,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:40:18,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:40:18,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1817428837, now seen corresponding path program 4 times [2023-11-19 07:40:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003000868] [2023-11-19 07:40:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:18,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003000868] [2023-11-19 07:40:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003000868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398638466] [2023-11-19 07:40:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:40:18,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:18,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:18,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:19,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:40:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:19,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:40:19,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:19,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:19,417 INFO L378 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 27 treesize of output 19 [2023-11-19 07:40:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:19,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:19,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:19,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-11-19 07:40:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:19,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398638466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:19,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:19,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-11-19 07:40:19,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084294415] [2023-11-19 07:40:19,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:19,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:40:19,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:40:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:40:21,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 399 [2023-11-19 07:40:21,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 990 flow. Second operand has 24 states, 24 states have (on average 140.58333333333334) internal successors, (3374), 24 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:21,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:21,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 399 [2023-11-19 07:40:21,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:23,141 INFO L124 PetriNetUnfolderBase]: 1639/2374 cut-off events. [2023-11-19 07:40:23,141 INFO L125 PetriNetUnfolderBase]: For 6226/6226 co-relation queries the response was YES. [2023-11-19 07:40:23,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 2374 events. 1639/2374 cut-off events. For 6226/6226 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9700 event pairs, 256 based on Foata normal form. 1/2375 useless extension candidates. Maximal degree in co-relation 9928. Up to 1739 conditions per place. [2023-11-19 07:40:23,179 INFO L140 encePairwiseOnDemand]: 387/399 looper letters, 121 selfloop transitions, 68 changer transitions 1/190 dead transitions. [2023-11-19 07:40:23,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 190 transitions, 1695 flow [2023-11-19 07:40:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:40:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:40:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2190 transitions. [2023-11-19 07:40:23,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659147869674185 [2023-11-19 07:40:23,188 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2190 transitions. [2023-11-19 07:40:23,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2190 transitions. [2023-11-19 07:40:23,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:23,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2190 transitions. [2023-11-19 07:40:23,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 399.0) internal successors, (6384), 16 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,207 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 399.0) internal successors, (6384), 16 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,207 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 990 flow. Second operand 15 states and 2190 transitions. [2023-11-19 07:40:23,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 190 transitions, 1695 flow [2023-11-19 07:40:23,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 190 transitions, 1613 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-11-19 07:40:23,238 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1260 flow [2023-11-19 07:40:23,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1260, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2023-11-19 07:40:23,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2023-11-19 07:40:23,240 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1260 flow [2023-11-19 07:40:23,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 140.58333333333334) internal successors, (3374), 24 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:23,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:23,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:23,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:40:23,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:40:23,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1534342453, now seen corresponding path program 5 times [2023-11-19 07:40:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:23,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32938083] [2023-11-19 07:40:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:24,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32938083] [2023-11-19 07:40:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32938083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772923812] [2023-11-19 07:40:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:40:24,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:24,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:24,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44650e75-248e-447b-a28f-be49e106eb81/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:24,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:24,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:24,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:40:24,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:24,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:24,666 INFO L378 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 27 treesize of output 19 [2023-11-19 07:40:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:24,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:24,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:24,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-11-19 07:40:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:25,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772923812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:25,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:25,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-19 07:40:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69334265] [2023-11-19 07:40:25,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:25,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:40:25,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:40:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:40:26,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 399 [2023-11-19 07:40:26,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1260 flow. Second operand has 21 states, 21 states have (on average 140.71428571428572) internal successors, (2955), 21 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:26,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:26,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 399 [2023-11-19 07:40:26,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand