./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme --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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:40,985 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:41,080 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:59:41,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:41,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:41,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:41,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:41,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:41,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:41,128 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:41,129 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:41,130 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:41,131 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:41,132 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:41,133 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:41,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:41,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:59:41,135 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:41,136 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:41,136 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:41,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:41,138 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:59:41,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:41,140 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:59:41,140 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:41,144 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:59:41,145 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:41,145 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:41,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:41,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:41,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:41,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:41,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:41,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:41,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:59:41,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:41,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:41,186 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:41,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:41,188 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:59:41,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:41,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:41,189 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_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2023-11-26 11:59:41,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:41,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:41,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:41,605 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:41,606 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:41,607 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-26 11:59:44,830 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:45,139 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:45,140 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-26 11:59:45,151 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/data/a5628bf4c/ffd74f39841c4d93b039c94f8732cf9a/FLAGc7c835af2 [2023-11-26 11:59:45,170 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/data/a5628bf4c/ffd74f39841c4d93b039c94f8732cf9a [2023-11-26 11:59:45,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:45,175 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:45,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:45,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:45,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:45,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6199c17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45, skipping insertion in model container [2023-11-26 11:59:45,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,225 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:45,505 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_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2023-11-26 11:59:45,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:45,539 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:45,569 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_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2023-11-26 11:59:45,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:45,590 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:45,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45 WrapperNode [2023-11-26 11:59:45,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:45,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:45,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:45,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:45,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,611 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,641 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2023-11-26 11:59:45,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:45,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:45,642 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:45,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:45,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,669 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,689 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 5, 2, 2]. 45 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]. [2023-11-26 11:59:45,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,702 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:45,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:45,717 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:45,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:45,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (1/1) ... [2023-11-26 11:59:45,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:45,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:45,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:59:45,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:59:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:59:45,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:59:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:59:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:59:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:59:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:59:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:59:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:59:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:59:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:59:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:59:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:59:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:59:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:59:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:59:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:59:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:59:45,883 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:59:46,094 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:46,100 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:46,461 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:46,833 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:46,833 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:59:46,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:46 BoogieIcfgContainer [2023-11-26 11:59:46,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:46,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:46,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:46,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:46,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:45" (1/3) ... [2023-11-26 11:59:46,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5ec574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:46, skipping insertion in model container [2023-11-26 11:59:46,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:45" (2/3) ... [2023-11-26 11:59:46,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5ec574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:46, skipping insertion in model container [2023-11-26 11:59:46,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:46" (3/3) ... [2023-11-26 11:59:46,849 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-11-26 11:59:46,856 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:59:46,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:46,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:59:46,866 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:59:46,912 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:59:46,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-26 11:59:46,980 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-26 11:59:46,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:59:46,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-26 11:59:46,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-26 11:59:46,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-26 11:59:46,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:47,007 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;@3978bd40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:47,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:59:47,033 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:59:47,034 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-26 11:59:47,034 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:59:47,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:47,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:47,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:47,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1764738099, now seen corresponding path program 1 times [2023-11-26 11:59:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:47,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379943152] [2023-11-26 11:59:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:47,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:47,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379943152] [2023-11-26 11:59:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379943152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:47,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113231211] [2023-11-26 11:59:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:47,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:47,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:47,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:47,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:47,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:47,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:47,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:47,747 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-26 11:59:47,747 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-26 11:59:47,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 137 events. 75/137 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 352 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-26 11:59:47,751 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-26 11:59:47,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 139 flow [2023-11-26 11:59:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:59:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-26 11:59:47,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-26 11:59:47,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-26 11:59:47,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-26 11:59:47,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:47,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-26 11:59:47,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,779 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 39 transitions. [2023-11-26 11:59:47,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 139 flow [2023-11-26 11:59:47,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:59:47,786 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-11-26 11:59:47,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-26 11:59:47,792 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-26 11:59:47,793 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-11-26 11:59:47,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:47,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:47,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:59:47,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:47,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1495654762, now seen corresponding path program 1 times [2023-11-26 11:59:47,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:47,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778738094] [2023-11-26 11:59:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:47,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778738094] [2023-11-26 11:59:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778738094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:48,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:48,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:48,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593064462] [2023-11-26 11:59:48,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:48,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:48,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:48,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:48,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:48,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:48,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:48,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:48,229 INFO L124 PetriNetUnfolderBase]: 75/138 cut-off events. [2023-11-26 11:59:48,229 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 11:59:48,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 138 events. 75/138 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 338 event pairs, 48 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-26 11:59:48,232 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-26 11:59:48,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 101 flow [2023-11-26 11:59:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:59:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-26 11:59:48,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-26 11:59:48,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-26 11:59:48,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-26 11:59:48,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:48,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-26 11:59:48,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2023-11-26 11:59:48,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:48,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:48,238 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 3 states and 28 transitions. [2023-11-26 11:59:48,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 101 flow [2023-11-26 11:59:48,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:59:48,241 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 68 flow [2023-11-26 11:59:48,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-26 11:59:48,242 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-26 11:59:48,243 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 68 flow [2023-11-26 11:59:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:48,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:48,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:48,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:59:48,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:48,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash 689632753, now seen corresponding path program 1 times [2023-11-26 11:59:48,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:48,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118160823] [2023-11-26 11:59:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:48,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118160823] [2023-11-26 11:59:48,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118160823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022885100] [2023-11-26 11:59:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:48,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:48,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:48,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:48,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:48,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:48,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:48,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:48,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022885100] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:48,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-26 11:59:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748519196] [2023-11-26 11:59:48,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:48,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:48,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-11-26 11:59:48,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:48,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:48,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:49,200 INFO L124 PetriNetUnfolderBase]: 83/152 cut-off events. [2023-11-26 11:59:49,201 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:59:49,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 152 events. 83/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 415 event pairs, 24 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 348. Up to 78 conditions per place. [2023-11-26 11:59:49,205 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2023-11-26 11:59:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 180 flow [2023-11-26 11:59:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:59:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2023-11-26 11:59:49,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-26 11:59:49,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2023-11-26 11:59:49,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2023-11-26 11:59:49,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:49,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2023-11-26 11:59:49,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,214 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 68 flow. Second operand 4 states and 48 transitions. [2023-11-26 11:59:49,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 180 flow [2023-11-26 11:59:49,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 176 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:59:49,222 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 90 flow [2023-11-26 11:59:49,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-26 11:59:49,225 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-26 11:59:49,225 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 90 flow [2023-11-26 11:59:49,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-11-26 11:59:49,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:49,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:49,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:49,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:49,434 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:49,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -888707086, now seen corresponding path program 1 times [2023-11-26 11:59:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57222252] [2023-11-26 11:59:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:49,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:49,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:49,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57222252] [2023-11-26 11:59:49,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57222252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:49,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:49,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:49,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728622645] [2023-11-26 11:59:49,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:49,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:49,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:49,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:49,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:49,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:49,825 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2023-11-26 11:59:49,825 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-26 11:59:49,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 186 events. 93/186 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 632 event pairs, 26 based on Foata normal form. 12/197 useless extension candidates. Maximal degree in co-relation 492. Up to 101 conditions per place. [2023-11-26 11:59:49,828 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-11-26 11:59:49,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2023-11-26 11:59:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:59:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2023-11-26 11:59:49,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-26 11:59:49,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2023-11-26 11:59:49,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2023-11-26 11:59:49,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:49,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2023-11-26 11:59:49,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,833 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 90 flow. Second operand 5 states and 56 transitions. [2023-11-26 11:59:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2023-11-26 11:59:49,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:59:49,837 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 117 flow [2023-11-26 11:59:49,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-26 11:59:49,838 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-26 11:59:49,839 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 117 flow [2023-11-26 11:59:49,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:49,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:49,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:49,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:59:49,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:49,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 936842816, now seen corresponding path program 2 times [2023-11-26 11:59:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874787062] [2023-11-26 11:59:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:49,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:49,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874787062] [2023-11-26 11:59:49,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874787062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:49,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:49,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:49,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465570693] [2023-11-26 11:59:49,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:49,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:49,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:49,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:49,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:49,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-11-26 11:59:49,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:49,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:49,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:50,121 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2023-11-26 11:59:50,122 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-11-26 11:59:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 181 events. 93/181 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 552 event pairs, 28 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 590. Up to 114 conditions per place. [2023-11-26 11:59:50,126 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2023-11-26 11:59:50,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 242 flow [2023-11-26 11:59:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:59:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-26 11:59:50,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-26 11:59:50,128 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-26 11:59:50,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-26 11:59:50,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:50,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-26 11:59:50,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2023-11-26 11:59:50,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,130 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 117 flow. Second operand 4 states and 46 transitions. [2023-11-26 11:59:50,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 242 flow [2023-11-26 11:59:50,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 229 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:59:50,135 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 136 flow [2023-11-26 11:59:50,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-26 11:59:50,136 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-26 11:59:50,136 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 136 flow [2023-11-26 11:59:50,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-11-26 11:59:50,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:50,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:50,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:59:50,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:50,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:50,138 INFO L85 PathProgramCache]: Analyzing trace with hash 278282927, now seen corresponding path program 2 times [2023-11-26 11:59:50,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300312288] [2023-11-26 11:59:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:50,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300312288] [2023-11-26 11:59:50,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300312288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:50,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:50,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762279016] [2023-11-26 11:59:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:50,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:50,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:50,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:50,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:50,429 INFO L124 PetriNetUnfolderBase]: 103/204 cut-off events. [2023-11-26 11:59:50,429 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-26 11:59:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 204 events. 103/204 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 26 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 684. Up to 107 conditions per place. [2023-11-26 11:59:50,432 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 9 changer transitions 10/53 dead transitions. [2023-11-26 11:59:50,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 355 flow [2023-11-26 11:59:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:59:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-26 11:59:50,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-26 11:59:50,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-26 11:59:50,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-26 11:59:50,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:50,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-26 11:59:50,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 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) [2023-11-26 11:59:50,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,436 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,436 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 136 flow. Second operand 6 states and 63 transitions. [2023-11-26 11:59:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 355 flow [2023-11-26 11:59:50,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:59:50,440 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 193 flow [2023-11-26 11:59:50,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-26 11:59:50,441 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-26 11:59:50,441 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 193 flow [2023-11-26 11:59:50,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:50,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:59:50,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:50,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1401451265, now seen corresponding path program 3 times [2023-11-26 11:59:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:50,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629798238] [2023-11-26 11:59:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:50,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:50,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629798238] [2023-11-26 11:59:50,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629798238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:50,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449185284] [2023-11-26 11:59:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:59:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:50,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:50,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:59:50,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:59:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:50,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:50,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:50,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:50,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449185284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:50,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:50,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-26 11:59:50,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256960813] [2023-11-26 11:59:50,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:50,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:59:50,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:50,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:59:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:50,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:50,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:50,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:50,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:51,002 INFO L124 PetriNetUnfolderBase]: 114/225 cut-off events. [2023-11-26 11:59:51,002 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-11-26 11:59:51,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 225 events. 114/225 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 745 event pairs, 38 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 866. Up to 145 conditions per place. [2023-11-26 11:59:51,006 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 36 selfloop transitions, 13 changer transitions 4/54 dead transitions. [2023-11-26 11:59:51,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 419 flow [2023-11-26 11:59:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:59:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-26 11:59:51,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-26 11:59:51,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-26 11:59:51,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-26 11:59:51,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:51,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-26 11:59:51,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,014 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 193 flow. Second operand 5 states and 57 transitions. [2023-11-26 11:59:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 419 flow [2023-11-26 11:59:51,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 397 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 11:59:51,020 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 277 flow [2023-11-26 11:59:51,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-26 11:59:51,021 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-11-26 11:59:51,021 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 277 flow [2023-11-26 11:59:51,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:51,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:51,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:59:51,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:59:51,229 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:51,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash -491136274, now seen corresponding path program 3 times [2023-11-26 11:59:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:51,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217989651] [2023-11-26 11:59:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:51,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:51,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217989651] [2023-11-26 11:59:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217989651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:51,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:51,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404227378] [2023-11-26 11:59:51,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:51,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:51,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:51,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:51,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-11-26 11:59:51,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:51,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:51,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:51,467 INFO L124 PetriNetUnfolderBase]: 114/218 cut-off events. [2023-11-26 11:59:51,467 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-11-26 11:59:51,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 218 events. 114/218 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 704 event pairs, 34 based on Foata normal form. 4/221 useless extension candidates. Maximal degree in co-relation 956. Up to 149 conditions per place. [2023-11-26 11:59:51,471 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 12 changer transitions 4/48 dead transitions. [2023-11-26 11:59:51,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 433 flow [2023-11-26 11:59:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:59:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-26 11:59:51,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-26 11:59:51,473 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-26 11:59:51,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-26 11:59:51,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:51,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-26 11:59:51,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,476 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 277 flow. Second operand 4 states and 45 transitions. [2023-11-26 11:59:51,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 433 flow [2023-11-26 11:59:51,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 414 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-26 11:59:51,482 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 305 flow [2023-11-26 11:59:51,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-11-26 11:59:51,486 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-26 11:59:51,486 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 305 flow [2023-11-26 11:59:51,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2023-11-26 11:59:51,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:51,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:51,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:59:51,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:51,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:51,487 INFO L85 PathProgramCache]: Analyzing trace with hash -107225049, now seen corresponding path program 4 times [2023-11-26 11:59:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271923249] [2023-11-26 11:59:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:51,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271923249] [2023-11-26 11:59:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271923249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:51,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:59:51,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342253917] [2023-11-26 11:59:51,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:51,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:51,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:51,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:51,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 11:59:51,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:51,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 11:59:51,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:59:51,806 INFO L124 PetriNetUnfolderBase]: 100/182 cut-off events. [2023-11-26 11:59:51,806 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-11-26 11:59:51,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 182 events. 100/182 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 518 event pairs, 31 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 833. Up to 130 conditions per place. [2023-11-26 11:59:51,809 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 32 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-26 11:59:51,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 440 flow [2023-11-26 11:59:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:59:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2023-11-26 11:59:51,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-26 11:59:51,813 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 45 transitions. [2023-11-26 11:59:51,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 45 transitions. [2023-11-26 11:59:51,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:59:51,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 45 transitions. [2023-11-26 11:59:51,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,815 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 305 flow. Second operand 5 states and 45 transitions. [2023-11-26 11:59:51,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 440 flow [2023-11-26 11:59:51,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 420 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-26 11:59:51,822 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 321 flow [2023-11-26 11:59:51,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-11-26 11:59:51,824 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-11-26 11:59:51,824 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 321 flow [2023-11-26 11:59:51,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:51,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:51,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:51,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:59:51,825 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:59:51,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1474385269, now seen corresponding path program 1 times [2023-11-26 11:59:51,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:51,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120635726] [2023-11-26 11:59:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:52,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:52,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120635726] [2023-11-26 11:59:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120635726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495976911] [2023-11-26 11:59:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:52,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:52,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:52,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db0c266-d119-49a7-9ee3-0aab8e2ce73e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:52,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:59:52,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:52,539 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 [2023-11-26 11:59:52,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:59:52,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2023-11-26 11:59:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:52,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:53,276 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 132 treesize of output 116 [2023-11-26 11:59:53,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:59:53,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 526 treesize of output 454 [2023-11-26 12:00:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:32,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495976911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:32,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:32,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-26 12:00:32,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133703894] [2023-11-26 12:00:32,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:32,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 12:00:32,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:32,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 12:00:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:00:32,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-26 12:00:32,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 321 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:32,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:00:32,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-26 12:00:32,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand