./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI --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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:50:06,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:50:06,326 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:50:06,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:50:06,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:50:06,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:50:06,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:50:06,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:50:06,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:50:06,361 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:50:06,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:50:06,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:50:06,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:50:06,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:50:06,368 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:50:06,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:50:06,371 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:50:06,371 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:50:06,371 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:50:06,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:50:06,372 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:50:06,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:50:06,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:50:06,374 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:50:06,374 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:50:06,375 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:50:06,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:50:06,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:50:06,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:50:06,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:50:06,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:50:06,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:50:06,379 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:50:06,379 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:50:06,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:50:06,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:50:06,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:50:06,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:50:06,381 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:50:06,381 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:50:06,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:50:06,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:50:06,382 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_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-24 21:50:06,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:50:06,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:50:06,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:50:06,785 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:50:06,786 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:50:06,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-24 21:50:10,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:50:10,283 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:50:10,284 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-24 21:50:10,294 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/data/598e931ac/13299f473802490a9abc4151546a1d63/FLAG4a2a577ea [2023-11-24 21:50:10,312 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/data/598e931ac/13299f473802490a9abc4151546a1d63 [2023-11-24 21:50:10,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:50:10,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:50:10,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:50:10,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:50:10,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:50:10,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263c0f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10, skipping insertion in model container [2023-11-24 21:50:10,332 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:50:10,571 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_22a3ea0f-425e-451d-9824-10157d37439b/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-24 21:50:10,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:50:10,597 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:50:10,623 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_22a3ea0f-425e-451d-9824-10157d37439b/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-24 21:50:10,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:50:10,637 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:50:10,637 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:50:10,647 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:50:10,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10 WrapperNode [2023-11-24 21:50:10,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:50:10,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:50:10,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:50:10,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:50:10,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,716 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2023-11-24 21:50:10,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:50:10,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:50:10,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:50:10,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:50:10,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,743 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,777 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-24 21:50:10,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,867 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:50:10,868 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:50:10,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:50:10,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:50:10,871 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (1/1) ... [2023-11-24 21:50:10,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:50:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:10,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:50:10,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:50:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:50:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:50:11,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:50:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:50:11,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:50:11,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:50:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:50:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:50:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:50:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:50:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:50:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:50:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:50:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:50:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:50:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:50:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:50:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:50:11,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:50:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:50:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:50:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:50:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:50:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:50:11,016 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:50:11,164 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:50:11,172 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:50:11,510 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:50:11,776 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:50:11,776 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:50:11,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:50:11 BoogieIcfgContainer [2023-11-24 21:50:11,777 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:50:11,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:50:11,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:50:11,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:50:11,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:50:10" (1/3) ... [2023-11-24 21:50:11,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682dd13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:50:11, skipping insertion in model container [2023-11-24 21:50:11,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:50:10" (2/3) ... [2023-11-24 21:50:11,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682dd13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:50:11, skipping insertion in model container [2023-11-24 21:50:11,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:50:11" (3/3) ... [2023-11-24 21:50:11,790 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-24 21:50:11,801 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:50:11,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:50:11,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:50:11,813 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:50:11,894 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:50:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2023-11-24 21:50:12,012 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-24 21:50:12,012 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:50:12,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2023-11-24 21:50:12,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2023-11-24 21:50:12,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2023-11-24 21:50:12,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:50:12,064 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;@4f795ab7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:50:12,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 21:50:12,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:50:12,099 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-11-24 21:50:12,099 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:50:12,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:12,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:12,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:12,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1474316529, now seen corresponding path program 1 times [2023-11-24 21:50:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:12,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048126062] [2023-11-24 21:50:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048126062] [2023-11-24 21:50:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048126062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:50:12,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:50:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:50:12,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510743853] [2023-11-24 21:50:12,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:50:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:50:12,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:50:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:50:12,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:12,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:12,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:12,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:12,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:12,717 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2023-11-24 21:50:12,717 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-24 21:50:12,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 776 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2023-11-24 21:50:12,727 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-11-24 21:50:12,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2023-11-24 21:50:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:50:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-24 21:50:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2023-11-24 21:50:12,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-24 21:50:12,743 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 35 transitions. [2023-11-24 21:50:12,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 35 transitions. [2023-11-24 21:50:12,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:12,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 35 transitions. [2023-11-24 21:50:12,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:12,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:12,765 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:12,767 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2023-11-24 21:50:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2023-11-24 21:50:12,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:50:12,777 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2023-11-24 21:50:12,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-24 21:50:12,784 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-11-24 21:50:12,785 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2023-11-24 21:50:12,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:12,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:12,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:12,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:50:12,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:12,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:12,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1351442730, now seen corresponding path program 1 times [2023-11-24 21:50:12,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:12,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134360639] [2023-11-24 21:50:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:12,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:13,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134360639] [2023-11-24 21:50:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134360639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:50:13,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:50:13,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:50:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445062507] [2023-11-24 21:50:13,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:50:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:50:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:50:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:50:13,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:13,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:13,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:13,285 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2023-11-24 21:50:13,285 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-24 21:50:13,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1240 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2023-11-24 21:50:13,294 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2023-11-24 21:50:13,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2023-11-24 21:50:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:50:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:50:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-24 21:50:13,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2023-11-24 21:50:13,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-24 21:50:13,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-24 21:50:13,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:13,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-24 21:50:13,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,311 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2023-11-24 21:50:13,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2023-11-24 21:50:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:50:13,318 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2023-11-24 21:50:13,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-24 21:50:13,320 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-24 21:50:13,320 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2023-11-24 21:50:13,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:13,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:13,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:50:13,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:13,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash -959153222, now seen corresponding path program 1 times [2023-11-24 21:50:13,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890554062] [2023-11-24 21:50:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890554062] [2023-11-24 21:50:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890554062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:50:13,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:50:13,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:50:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581573627] [2023-11-24 21:50:13,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:50:13,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:50:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:50:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:50:13,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:13,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:13,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:13,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:13,603 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2023-11-24 21:50:13,603 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-24 21:50:13,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1567 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2023-11-24 21:50:13,607 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2023-11-24 21:50:13,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2023-11-24 21:50:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:50:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:50:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-24 21:50:13,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-11-24 21:50:13,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-24 21:50:13,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-24 21:50:13,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:13,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-24 21:50:13,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,613 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2023-11-24 21:50:13,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2023-11-24 21:50:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:50:13,616 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2023-11-24 21:50:13,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-24 21:50:13,618 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-24 21:50:13,618 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2023-11-24 21:50:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:13,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:13,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:13,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:50:13,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:13,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 171303639, now seen corresponding path program 1 times [2023-11-24 21:50:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784129437] [2023-11-24 21:50:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:13,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:14,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:14,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784129437] [2023-11-24 21:50:14,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784129437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:50:14,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:50:14,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:50:14,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844021969] [2023-11-24 21:50:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:50:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:50:14,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:50:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:50:14,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:14,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:14,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:14,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:14,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:14,188 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2023-11-24 21:50:14,189 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-24 21:50:14,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2284 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2023-11-24 21:50:14,194 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2023-11-24 21:50:14,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2023-11-24 21:50:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:50:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:50:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2023-11-24 21:50:14,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2023-11-24 21:50:14,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 63 transitions. [2023-11-24 21:50:14,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 63 transitions. [2023-11-24 21:50:14,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:14,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 63 transitions. [2023-11-24 21:50:14,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:14,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:14,203 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:14,203 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2023-11-24 21:50:14,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2023-11-24 21:50:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:50:14,207 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2023-11-24 21:50:14,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-24 21:50:14,209 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-11-24 21:50:14,210 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2023-11-24 21:50:14,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:14,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:14,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:14,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:50:14,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:14,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -832023193, now seen corresponding path program 1 times [2023-11-24 21:50:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894802762] [2023-11-24 21:50:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:50:14,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:14,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894802762] [2023-11-24 21:50:14,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894802762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464797001] [2023-11-24 21:50:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:14,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:14,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:14,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:50:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:14,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:50:14,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:14,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:50:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:15,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:15,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-11-24 21:50:15,442 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:50:15,443 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 53 treesize of output 41 [2023-11-24 21:50:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:15,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464797001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:15,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:15,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2023-11-24 21:50:15,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749882793] [2023-11-24 21:50:15,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:15,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:50:15,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:50:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:50:15,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:15,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:15,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:15,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:15,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:15,821 INFO L124 PetriNetUnfolderBase]: 232/455 cut-off events. [2023-11-24 21:50:15,821 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-24 21:50:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 455 events. 232/455 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2049 event pairs, 45 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 974. Up to 113 conditions per place. [2023-11-24 21:50:15,825 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 38 selfloop transitions, 6 changer transitions 13/62 dead transitions. [2023-11-24 21:50:15,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 283 flow [2023-11-24 21:50:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:50:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:50:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2023-11-24 21:50:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2023-11-24 21:50:15,827 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2023-11-24 21:50:15,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2023-11-24 21:50:15,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:15,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2023-11-24 21:50:15,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:15,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:15,830 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:15,831 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 7 states and 107 transitions. [2023-11-24 21:50:15,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 283 flow [2023-11-24 21:50:15,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-24 21:50:15,834 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 102 flow [2023-11-24 21:50:15,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=102, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-11-24 21:50:15,835 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2023-11-24 21:50:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 102 flow [2023-11-24 21:50:15,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:15,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:15,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:15,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:50:16,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:16,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:16,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1783023759, now seen corresponding path program 2 times [2023-11-24 21:50:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812835807] [2023-11-24 21:50:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:50:16,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:16,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812835807] [2023-11-24 21:50:16,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812835807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:16,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471586858] [2023-11-24 21:50:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:50:16,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:16,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:16,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:50:16,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:50:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:50:16,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:50:16,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:50:16,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:50:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471586858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:16,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:16,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-11-24 21:50:16,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69673427] [2023-11-24 21:50:16,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:16,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:50:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:50:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:50:16,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:16,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:16,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:16,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:16,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:17,243 INFO L124 PetriNetUnfolderBase]: 657/1294 cut-off events. [2023-11-24 21:50:17,243 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2023-11-24 21:50:17,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1294 events. 657/1294 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7557 event pairs, 234 based on Foata normal form. 38/1094 useless extension candidates. Maximal degree in co-relation 2838. Up to 335 conditions per place. [2023-11-24 21:50:17,253 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 46 selfloop transitions, 9 changer transitions 39/99 dead transitions. [2023-11-24 21:50:17,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 494 flow [2023-11-24 21:50:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:50:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:50:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2023-11-24 21:50:17,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938697318007663 [2023-11-24 21:50:17,258 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 155 transitions. [2023-11-24 21:50:17,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 155 transitions. [2023-11-24 21:50:17,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:17,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 155 transitions. [2023-11-24 21:50:17,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:17,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:17,263 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:17,264 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 102 flow. Second operand 9 states and 155 transitions. [2023-11-24 21:50:17,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 494 flow [2023-11-24 21:50:17,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 99 transitions, 478 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-24 21:50:17,272 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 174 flow [2023-11-24 21:50:17,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-24 21:50:17,274 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2023-11-24 21:50:17,274 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 174 flow [2023-11-24 21:50:17,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:17,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:17,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:17,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:50:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:50:17,482 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:17,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash -23646222, now seen corresponding path program 3 times [2023-11-24 21:50:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:17,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68450393] [2023-11-24 21:50:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68450393] [2023-11-24 21:50:18,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68450393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322231028] [2023-11-24 21:50:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:50:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:18,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:18,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:50:18,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:50:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:50:18,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:50:18,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:18,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:50:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:18,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:19,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-11-24 21:50:19,381 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:50:19,382 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 61 treesize of output 47 [2023-11-24 21:50:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322231028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:19,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:19,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-24 21:50:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321945055] [2023-11-24 21:50:19,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:19,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:50:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:50:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:50:19,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:19,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 174 flow. Second operand has 19 states, 19 states have (on average 9.526315789473685) internal successors, (181), 19 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:19,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:19,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:19,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:21,802 INFO L124 PetriNetUnfolderBase]: 1865/3627 cut-off events. [2023-11-24 21:50:21,803 INFO L125 PetriNetUnfolderBase]: For 2880/2880 co-relation queries the response was YES. [2023-11-24 21:50:21,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8783 conditions, 3627 events. 1865/3627 cut-off events. For 2880/2880 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 23629 event pairs, 482 based on Foata normal form. 12/3001 useless extension candidates. Maximal degree in co-relation 8770. Up to 586 conditions per place. [2023-11-24 21:50:21,831 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 162 selfloop transitions, 32 changer transitions 30/229 dead transitions. [2023-11-24 21:50:21,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 229 transitions, 1350 flow [2023-11-24 21:50:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:50:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:50:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 337 transitions. [2023-11-24 21:50:21,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6116152450090744 [2023-11-24 21:50:21,836 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 337 transitions. [2023-11-24 21:50:21,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 337 transitions. [2023-11-24 21:50:21,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:21,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 337 transitions. [2023-11-24 21:50:21,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 17.736842105263158) internal successors, (337), 19 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:21,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 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) [2023-11-24 21:50:21,840 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 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) [2023-11-24 21:50:21,840 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 174 flow. Second operand 19 states and 337 transitions. [2023-11-24 21:50:21,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 229 transitions, 1350 flow [2023-11-24 21:50:21,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 229 transitions, 1314 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-11-24 21:50:21,854 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 575 flow [2023-11-24 21:50:21,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=575, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-11-24 21:50:21,856 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2023-11-24 21:50:21,856 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 575 flow [2023-11-24 21:50:21,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.526315789473685) internal successors, (181), 19 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:21,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:21,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:21,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:50:22,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:50:22,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:22,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1384883908, now seen corresponding path program 4 times [2023-11-24 21:50:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:22,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446409916] [2023-11-24 21:50:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:22,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:50:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446409916] [2023-11-24 21:50:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446409916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801524812] [2023-11-24 21:50:22,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:50:22,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:22,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:22,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:22,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:50:22,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:50:22,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:50:22,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:50:22,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:50:27,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:27,150 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:50:27,150 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 28 treesize of output 11 [2023-11-24 21:50:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:50:27,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801524812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:27,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:27,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-11-24 21:50:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052143346] [2023-11-24 21:50:27,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:27,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:50:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:50:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2023-11-24 21:50:27,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:27,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 575 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:27,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:27,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:27,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:29,710 INFO L124 PetriNetUnfolderBase]: 4789/9088 cut-off events. [2023-11-24 21:50:29,710 INFO L125 PetriNetUnfolderBase]: For 27060/27060 co-relation queries the response was YES. [2023-11-24 21:50:29,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25982 conditions, 9088 events. 4789/9088 cut-off events. For 27060/27060 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 69527 event pairs, 752 based on Foata normal form. 82/7574 useless extension candidates. Maximal degree in co-relation 25959. Up to 1392 conditions per place. [2023-11-24 21:50:29,787 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 116 selfloop transitions, 85 changer transitions 74/280 dead transitions. [2023-11-24 21:50:29,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 280 transitions, 2361 flow [2023-11-24 21:50:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:50:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-24 21:50:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 317 transitions. [2023-11-24 21:50:29,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6430020283975659 [2023-11-24 21:50:29,790 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 317 transitions. [2023-11-24 21:50:29,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 317 transitions. [2023-11-24 21:50:29,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:29,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 317 transitions. [2023-11-24 21:50:29,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 18.647058823529413) internal successors, (317), 17 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:29,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:29,794 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:29,795 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 575 flow. Second operand 17 states and 317 transitions. [2023-11-24 21:50:29,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 280 transitions, 2361 flow [2023-11-24 21:50:29,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 280 transitions, 2085 flow, removed 136 selfloop flow, removed 2 redundant places. [2023-11-24 21:50:29,851 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 1436 flow [2023-11-24 21:50:29,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1436, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2023-11-24 21:50:29,855 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2023-11-24 21:50:29,855 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 1436 flow [2023-11-24 21:50:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:29,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:29,855 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:29,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:50:30,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:50:30,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:30,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1358877817, now seen corresponding path program 5 times [2023-11-24 21:50:30,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:30,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820695643] [2023-11-24 21:50:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:30,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:30,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:30,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820695643] [2023-11-24 21:50:30,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820695643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:30,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646146719] [2023-11-24 21:50:30,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:50:30,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:30,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:30,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:50:31,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-24 21:50:31,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:50:31,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:50:31,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:50:31,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:31,316 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:50:31,316 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 28 treesize of output 11 [2023-11-24 21:50:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:50:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646146719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:31,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:31,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 19 [2023-11-24 21:50:31,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176817371] [2023-11-24 21:50:31,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:31,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:50:31,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:50:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:50:31,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 1436 flow. Second operand has 20 states, 20 states have (on average 9.7) internal successors, (194), 20 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:31,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:31,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:34,981 INFO L124 PetriNetUnfolderBase]: 6805/12856 cut-off events. [2023-11-24 21:50:34,982 INFO L125 PetriNetUnfolderBase]: For 71176/71176 co-relation queries the response was YES. [2023-11-24 21:50:35,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40762 conditions, 12856 events. 6805/12856 cut-off events. For 71176/71176 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 103338 event pairs, 1044 based on Foata normal form. 4/10616 useless extension candidates. Maximal degree in co-relation 40729. Up to 1968 conditions per place. [2023-11-24 21:50:35,109 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 133 selfloop transitions, 130 changer transitions 80/348 dead transitions. [2023-11-24 21:50:35,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 348 transitions, 3356 flow [2023-11-24 21:50:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:50:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 21:50:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 374 transitions. [2023-11-24 21:50:35,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2023-11-24 21:50:35,112 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 374 transitions. [2023-11-24 21:50:35,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 374 transitions. [2023-11-24 21:50:35,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:35,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 374 transitions. [2023-11-24 21:50:35,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 17.0) internal successors, (374), 22 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:35,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:35,118 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:35,118 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 1436 flow. Second operand 22 states and 374 transitions. [2023-11-24 21:50:35,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 348 transitions, 3356 flow [2023-11-24 21:50:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 348 transitions, 2906 flow, removed 211 selfloop flow, removed 4 redundant places. [2023-11-24 21:50:35,434 INFO L231 Difference]: Finished difference. Result has 111 places, 164 transitions, 1814 flow [2023-11-24 21:50:35,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1814, PETRI_PLACES=111, PETRI_TRANSITIONS=164} [2023-11-24 21:50:35,436 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 83 predicate places. [2023-11-24 21:50:35,436 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 164 transitions, 1814 flow [2023-11-24 21:50:35,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.7) internal successors, (194), 20 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:35,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:35,437 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:35,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-24 21:50:35,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:35,639 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:35,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1429812671, now seen corresponding path program 6 times [2023-11-24 21:50:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:35,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852374908] [2023-11-24 21:50:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:50:35,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852374908] [2023-11-24 21:50:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852374908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030950347] [2023-11-24 21:50:35,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:50:35,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:35,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:35,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:50:36,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-24 21:50:36,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:50:36,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:50:36,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:36,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:50:36,907 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2023-11-24 21:50:36,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-11-24 21:50:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:50:36,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:38,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2023-11-24 21:50:38,097 INFO L349 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-11-24 21:50:38,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 78 [2023-11-24 21:50:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:50:38,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030950347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:38,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:38,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 24 [2023-11-24 21:50:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633514315] [2023-11-24 21:50:38,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:38,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:50:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:50:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:50:38,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:38,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 164 transitions, 1814 flow. Second operand has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:38,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:38,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:38,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:46,020 INFO L124 PetriNetUnfolderBase]: 9762/18442 cut-off events. [2023-11-24 21:50:46,021 INFO L125 PetriNetUnfolderBase]: For 92925/92925 co-relation queries the response was YES. [2023-11-24 21:50:46,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56846 conditions, 18442 events. 9762/18442 cut-off events. For 92925/92925 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 156091 event pairs, 2860 based on Foata normal form. 15/15244 useless extension candidates. Maximal degree in co-relation 56812. Up to 5378 conditions per place. [2023-11-24 21:50:46,142 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 109 selfloop transitions, 49 changer transitions 273/436 dead transitions. [2023-11-24 21:50:46,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 436 transitions, 4273 flow [2023-11-24 21:50:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 21:50:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-24 21:50:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 417 transitions. [2023-11-24 21:50:46,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5991379310344828 [2023-11-24 21:50:46,146 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 417 transitions. [2023-11-24 21:50:46,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 417 transitions. [2023-11-24 21:50:46,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:46,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 417 transitions. [2023-11-24 21:50:46,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 17.375) internal successors, (417), 24 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:46,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:46,151 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:46,151 INFO L175 Difference]: Start difference. First operand has 111 places, 164 transitions, 1814 flow. Second operand 24 states and 417 transitions. [2023-11-24 21:50:46,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 436 transitions, 4273 flow [2023-11-24 21:50:46,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 436 transitions, 4030 flow, removed 51 selfloop flow, removed 11 redundant places. [2023-11-24 21:50:46,813 INFO L231 Difference]: Finished difference. Result has 136 places, 103 transitions, 1209 flow [2023-11-24 21:50:46,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1209, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2023-11-24 21:50:46,815 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2023-11-24 21:50:46,815 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 1209 flow [2023-11-24 21:50:46,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:46,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:46,815 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:46,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:50:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:50:47,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 67419759, now seen corresponding path program 7 times [2023-11-24 21:50:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222461447] [2023-11-24 21:50:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:50:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:47,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222461447] [2023-11-24 21:50:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222461447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786718634] [2023-11-24 21:50:47,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:50:47,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:47,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:47,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:50:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:47,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:50:47,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 21:50:47,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 21:50:47,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786718634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:47,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:47,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-11-24 21:50:47,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557288299] [2023-11-24 21:50:47,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:47,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:50:47,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:50:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:50:47,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:47,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 1209 flow. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:47,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:47,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:47,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:50:49,987 INFO L124 PetriNetUnfolderBase]: 5520/10639 cut-off events. [2023-11-24 21:50:49,987 INFO L125 PetriNetUnfolderBase]: For 67283/67283 co-relation queries the response was YES. [2023-11-24 21:50:50,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32905 conditions, 10639 events. 5520/10639 cut-off events. For 67283/67283 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 86682 event pairs, 1153 based on Foata normal form. 180/8926 useless extension candidates. Maximal degree in co-relation 32858. Up to 1957 conditions per place. [2023-11-24 21:50:50,093 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 81 selfloop transitions, 55 changer transitions 193/334 dead transitions. [2023-11-24 21:50:50,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 334 transitions, 3010 flow [2023-11-24 21:50:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:50:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 21:50:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 392 transitions. [2023-11-24 21:50:50,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6144200626959248 [2023-11-24 21:50:50,097 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 392 transitions. [2023-11-24 21:50:50,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 392 transitions. [2023-11-24 21:50:50,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:50:50,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 392 transitions. [2023-11-24 21:50:50,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 17.818181818181817) internal successors, (392), 22 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:50,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:50,103 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:50,103 INFO L175 Difference]: Start difference. First operand has 136 places, 103 transitions, 1209 flow. Second operand 22 states and 392 transitions. [2023-11-24 21:50:50,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 334 transitions, 3010 flow [2023-11-24 21:50:50,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 334 transitions, 2629 flow, removed 173 selfloop flow, removed 24 redundant places. [2023-11-24 21:50:50,610 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 941 flow [2023-11-24 21:50:50,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=941, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2023-11-24 21:50:50,611 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2023-11-24 21:50:50,611 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 941 flow [2023-11-24 21:50:50,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:50,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:50:50,612 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:50:50,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:50:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:50,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:50:50,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:50:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2118179900, now seen corresponding path program 8 times [2023-11-24 21:50:50,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:50:50,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718090314] [2023-11-24 21:50:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:50:50,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:50:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:50:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:50:51,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:50:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718090314] [2023-11-24 21:50:51,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718090314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:50:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355702950] [2023-11-24 21:50:51,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:50:51,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:50:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:50:51,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:50:51,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22a3ea0f-425e-451d-9824-10157d37439b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:50:51,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:50:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:50:51,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:50:51,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:50:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:50:52,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:50:52,464 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:50:52,464 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 11 [2023-11-24 21:50:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 21:50:52,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355702950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:50:52,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:50:52,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 32 [2023-11-24 21:50:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89813996] [2023-11-24 21:50:52,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:50:52,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-24 21:50:52,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:50:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-24 21:50:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 21:50:52,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-24 21:50:52,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 941 flow. Second operand has 33 states, 33 states have (on average 9.515151515151516) internal successors, (314), 33 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:50:52,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:50:52,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-24 21:50:52,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand