./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/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_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/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_a8730e50-7c57-44ad-aebb-a8d161105cf3/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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:01,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:01,842 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:01,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:01,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:01,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:01,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:01,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:01,891 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:01,892 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:01,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:01,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:01,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:01,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:01,896 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:01,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:01,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:01,898 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:01,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:01,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:01,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:01,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:01,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:01,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:01,903 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:01,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:01,904 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:01,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:01,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:01,906 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:01,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:01,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:01,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:01,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:01,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:01,909 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:01,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:01,910 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:01,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:01,911 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:01,912 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:01,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:01,913 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_a8730e50-7c57-44ad-aebb-a8d161105cf3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2023-11-26 11:55:02,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:02,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:02,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:02,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:02,271 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:02,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-26 11:55:05,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:05,697 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:05,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-26 11:55:05,711 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/data/0e2c158ab/de1f5b73b18b4ef1afc7ea8b05bcf52e/FLAG077bab7c0 [2023-11-26 11:55:05,729 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/data/0e2c158ab/de1f5b73b18b4ef1afc7ea8b05bcf52e [2023-11-26 11:55:05,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:05,739 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:05,741 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:05,741 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:05,747 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:05,748 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:05" (1/1) ... [2023-11-26 11:55:05,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383aba4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:05, skipping insertion in model container [2023-11-26 11:55:05,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:05" (1/1) ... [2023-11-26 11:55:05,780 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:06,024 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_a8730e50-7c57-44ad-aebb-a8d161105cf3/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-26 11:55:06,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:06,064 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:06,110 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_a8730e50-7c57-44ad-aebb-a8d161105cf3/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-26 11:55:06,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:06,131 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:06,131 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:55:06,139 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:06,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06 WrapperNode [2023-11-26 11:55:06,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:06,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:06,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:06,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:06,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,201 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2023-11-26 11:55:06,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:06,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:06,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:06,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:06,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,220 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,239 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:55:06,239 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,239 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,269 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,271 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,275 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:06,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:06,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:06,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:06,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (1/1) ... [2023-11-26 11:55:06,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:06,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:06,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:55:06,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:06,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:55:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:55:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:55:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:55:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:55:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:55:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:55:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:55:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:55:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:06,374 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 11:55:06,538 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:06,540 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:06,864 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:07,205 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:07,205 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:55:07,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:07 BoogieIcfgContainer [2023-11-26 11:55:07,206 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:07,209 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:07,209 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:07,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:07,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:05" (1/3) ... [2023-11-26 11:55:07,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3640a6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:07, skipping insertion in model container [2023-11-26 11:55:07,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:06" (2/3) ... [2023-11-26 11:55:07,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3640a6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:07, skipping insertion in model container [2023-11-26 11:55:07,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:07" (3/3) ... [2023-11-26 11:55:07,216 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-26 11:55:07,226 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:55:07,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:07,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:07,239 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:55:07,290 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:55:07,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 64 flow [2023-11-26 11:55:07,364 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-26 11:55:07,364 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:55:07,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 3/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-26 11:55:07,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 64 flow [2023-11-26 11:55:07,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 56 flow [2023-11-26 11:55:07,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:07,403 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;@404f6a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:07,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:55:07,418 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:55:07,418 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-26 11:55:07,419 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:55:07,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:07,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:07,420 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 11:55:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 380329243, now seen corresponding path program 1 times [2023-11-26 11:55:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480407882] [2023-11-26 11:55:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:07,769 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 11:55:07,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:07,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480407882] [2023-11-26 11:55:07,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480407882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:07,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:07,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:07,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457580176] [2023-11-26 11:55:07,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:07,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-26 11:55:07,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:55:07,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:07,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-26 11:55:07,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:07,959 INFO L124 PetriNetUnfolderBase]: 100/194 cut-off events. [2023-11-26 11:55:07,959 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 11:55:07,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 194 events. 100/194 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 626 event pairs, 24 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 314. Up to 122 conditions per place. [2023-11-26 11:55:07,965 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2023-11-26 11:55:07,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2023-11-26 11:55:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:55:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-26 11:55:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2023-11-26 11:55:07,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-26 11:55:07,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-26 11:55:07,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:07,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-26 11:55:07,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:55:07,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 11:55:07,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 11:55:07,991 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 47 transitions. [2023-11-26 11:55:07,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2023-11-26 11:55:07,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:07,998 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 67 flow [2023-11-26 11:55:08,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-26 11:55:08,017 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-26 11:55:08,017 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 67 flow [2023-11-26 11:55:08,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 11:55:08,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:08,018 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 11:55:08,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:08,018 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 11:55:08,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:08,019 INFO L85 PathProgramCache]: Analyzing trace with hash 468797561, now seen corresponding path program 1 times [2023-11-26 11:55:08,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:08,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716121870] [2023-11-26 11:55:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:08,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:08,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716121870] [2023-11-26 11:55:08,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716121870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:08,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:08,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092092359] [2023-11-26 11:55:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:08,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:08,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:08,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:08,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:08,480 INFO L124 PetriNetUnfolderBase]: 184/356 cut-off events. [2023-11-26 11:55:08,480 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-26 11:55:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 356 events. 184/356 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1444 event pairs, 121 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 277. Up to 223 conditions per place. [2023-11-26 11:55:08,485 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-26 11:55:08,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 228 flow [2023-11-26 11:55:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:55:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2023-11-26 11:55:08,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2023-11-26 11:55:08,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 64 transitions. [2023-11-26 11:55:08,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 64 transitions. [2023-11-26 11:55:08,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:08,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 64 transitions. [2023-11-26 11:55:08,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 11:55:08,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:08,491 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:08,491 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 67 flow. Second operand 5 states and 64 transitions. [2023-11-26 11:55:08,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 228 flow [2023-11-26 11:55:08,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 49 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:08,494 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 100 flow [2023-11-26 11:55:08,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-11-26 11:55:08,495 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-11-26 11:55:08,496 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 100 flow [2023-11-26 11:55:08,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:08,496 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 11:55:08,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:55:08,497 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 11:55:08,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1187897832, now seen corresponding path program 1 times [2023-11-26 11:55:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:08,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056265301] [2023-11-26 11:55:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:08,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:08,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056265301] [2023-11-26 11:55:08,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056265301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:08,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:08,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:08,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866987124] [2023-11-26 11:55:08,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:08,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:08,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:08,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:08,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:08,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:08,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:08,899 INFO L124 PetriNetUnfolderBase]: 149/292 cut-off events. [2023-11-26 11:55:08,900 INFO L125 PetriNetUnfolderBase]: For 102/111 co-relation queries the response was YES. [2023-11-26 11:55:08,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 292 events. 149/292 cut-off events. For 102/111 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1120 event pairs, 103 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 557. Up to 223 conditions per place. [2023-11-26 11:55:08,903 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 21 selfloop transitions, 2 changer transitions 17/42 dead transitions. [2023-11-26 11:55:08,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 221 flow [2023-11-26 11:55:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:55:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2023-11-26 11:55:08,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472 [2023-11-26 11:55:08,905 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 59 transitions. [2023-11-26 11:55:08,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 59 transitions. [2023-11-26 11:55:08,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:08,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 59 transitions. [2023-11-26 11:55:08,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 11:55:08,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:08,908 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:08,908 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 100 flow. Second operand 5 states and 59 transitions. [2023-11-26 11:55:08,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 221 flow [2023-11-26 11:55:08,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:08,911 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 88 flow [2023-11-26 11:55:08,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-26 11:55:08,912 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2023-11-26 11:55:08,913 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 88 flow [2023-11-26 11:55:08,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:08,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:08,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:08,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:08,914 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 11:55:08,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1820180955, now seen corresponding path program 1 times [2023-11-26 11:55:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:08,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477093595] [2023-11-26 11:55:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477093595] [2023-11-26 11:55:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477093595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184371287] [2023-11-26 11:55:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:09,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:09,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:09,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:09,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:09,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:09,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:09,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184371287] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:09,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:09,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-26 11:55:09,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030842754] [2023-11-26 11:55:09,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:09,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:09,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:09,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:09,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:09,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:09,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:09,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:09,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:09,443 INFO L124 PetriNetUnfolderBase]: 125/229 cut-off events. [2023-11-26 11:55:09,443 INFO L125 PetriNetUnfolderBase]: For 76/91 co-relation queries the response was YES. [2023-11-26 11:55:09,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 229 events. 125/229 cut-off events. For 76/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 767 event pairs, 35 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 593. Up to 121 conditions per place. [2023-11-26 11:55:09,446 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2023-11-26 11:55:09,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 181 flow [2023-11-26 11:55:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:55:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-26 11:55:09,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-26 11:55:09,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-26 11:55:09,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-26 11:55:09,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:09,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-26 11:55:09,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 11:55:09,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:09,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:09,451 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 88 flow. Second operand 5 states and 50 transitions. [2023-11-26 11:55:09,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 181 flow [2023-11-26 11:55:09,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 34 transitions, 157 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-26 11:55:09,455 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 93 flow [2023-11-26 11:55:09,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-26 11:55:09,459 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-11-26 11:55:09,459 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 93 flow [2023-11-26 11:55:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:09,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:09,668 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 11:55:09,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1013209238, now seen corresponding path program 1 times [2023-11-26 11:55:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:09,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947760194] [2023-11-26 11:55:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:09,831 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 11:55:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947760194] [2023-11-26 11:55:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947760194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269645545] [2023-11-26 11:55:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:09,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:09,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:09,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:09,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:55:09,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:10,009 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 11:55:10,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:10,072 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 11:55:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269645545] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:10,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:10,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-26 11:55:10,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137683535] [2023-11-26 11:55:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:10,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:10,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:55:10,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:10,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:10,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:10,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:10,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:10,183 INFO L124 PetriNetUnfolderBase]: 122/225 cut-off events. [2023-11-26 11:55:10,183 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-26 11:55:10,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 225 events. 122/225 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 726 event pairs, 32 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 578. Up to 113 conditions per place. [2023-11-26 11:55:10,185 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-26 11:55:10,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 190 flow [2023-11-26 11:55:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:55:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-26 11:55:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-26 11:55:10,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-26 11:55:10,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-26 11:55:10,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:10,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-26 11:55:10,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 11:55:10,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:10,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 11:55:10,190 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 93 flow. Second operand 5 states and 50 transitions. [2023-11-26 11:55:10,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 190 flow [2023-11-26 11:55:10,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:55:10,192 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2023-11-26 11:55:10,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-26 11:55:10,193 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-11-26 11:55:10,193 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2023-11-26 11:55:10,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:10,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:10,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:10,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:10,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:10,400 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 11:55:10,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash 427248614, now seen corresponding path program 1 times [2023-11-26 11:55:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434537998] [2023-11-26 11:55:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:11,075 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 11:55:11,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:11,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434537998] [2023-11-26 11:55:11,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434537998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:11,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197157138] [2023-11-26 11:55:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:11,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:11,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:11,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:11,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:11,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:55:11,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:11,260 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 11:55:11,380 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 11:55:11,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:11,483 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 11:55:11,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197157138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:11,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:11,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 14 [2023-11-26 11:55:11,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910915479] [2023-11-26 11:55:11,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:11,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:55:11,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:55:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:55:11,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-26 11:55:11,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 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 11:55:11,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:11,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-26 11:55:11,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:11,857 INFO L124 PetriNetUnfolderBase]: 142/281 cut-off events. [2023-11-26 11:55:11,858 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-11-26 11:55:11,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 281 events. 142/281 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 994 event pairs, 33 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 789. Up to 160 conditions per place. [2023-11-26 11:55:11,861 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 36 selfloop transitions, 20 changer transitions 1/62 dead transitions. [2023-11-26 11:55:11,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 354 flow [2023-11-26 11:55:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:55:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2023-11-26 11:55:11,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2023-11-26 11:55:11,864 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 101 transitions. [2023-11-26 11:55:11,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 101 transitions. [2023-11-26 11:55:11,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:11,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 101 transitions. [2023-11-26 11:55:11,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 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 11:55:11,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:11,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:11,867 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 9 states and 101 transitions. [2023-11-26 11:55:11,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 354 flow [2023-11-26 11:55:11,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 343 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:55:11,872 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 250 flow [2023-11-26 11:55:11,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-26 11:55:11,873 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-11-26 11:55:11,873 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 250 flow [2023-11-26 11:55:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 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 11:55:11,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:11,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:12,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:55:12,080 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 11:55:12,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash 539754996, now seen corresponding path program 2 times [2023-11-26 11:55:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:12,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461095906] [2023-11-26 11:55:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:12,738 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 11:55:12,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:12,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461095906] [2023-11-26 11:55:12,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461095906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:12,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471942189] [2023-11-26 11:55:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:12,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:12,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:12,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:12,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:55:12,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:12,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:55:12,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:12,976 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 11:55:12,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:13,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:13,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-26 11:55:13,083 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 11:55:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471942189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:13,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:13,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2023-11-26 11:55:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976833627] [2023-11-26 11:55:13,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:13,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:55:13,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:55:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:55:13,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-26 11:55:13,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 250 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 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 11:55:13,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:13,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-26 11:55:13,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:13,624 INFO L124 PetriNetUnfolderBase]: 205/419 cut-off events. [2023-11-26 11:55:13,624 INFO L125 PetriNetUnfolderBase]: For 694/698 co-relation queries the response was YES. [2023-11-26 11:55:13,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 419 events. 205/419 cut-off events. For 694/698 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1796 event pairs, 30 based on Foata normal form. 5/420 useless extension candidates. Maximal degree in co-relation 1427. Up to 182 conditions per place. [2023-11-26 11:55:13,631 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 47 selfloop transitions, 40 changer transitions 1/93 dead transitions. [2023-11-26 11:55:13,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 651 flow [2023-11-26 11:55:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:55:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:55:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2023-11-26 11:55:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2023-11-26 11:55:13,635 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 136 transitions. [2023-11-26 11:55:13,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 136 transitions. [2023-11-26 11:55:13,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:13,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 136 transitions. [2023-11-26 11:55:13,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 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 11:55:13,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 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 11:55:13,641 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 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 11:55:13,641 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 250 flow. Second operand 12 states and 136 transitions. [2023-11-26 11:55:13,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 651 flow [2023-11-26 11:55:13,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 93 transitions, 623 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:13,651 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 468 flow [2023-11-26 11:55:13,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=468, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-26 11:55:13,653 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2023-11-26 11:55:13,654 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 468 flow [2023-11-26 11:55:13,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 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 11:55:13,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:13,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:13,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:55:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:55:13,861 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 11:55:13,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -911825096, now seen corresponding path program 3 times [2023-11-26 11:55:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:13,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565916136] [2023-11-26 11:55:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:14,453 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 11:55:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:14,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565916136] [2023-11-26 11:55:14,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565916136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472498114] [2023-11-26 11:55:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:55:14,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:14,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:14,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:14,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:14,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:55:14,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:14,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:55:14,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:14,684 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 11:55:14,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:14,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:14,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2023-11-26 11:55:14,780 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 11:55:14,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472498114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:14,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:14,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 12 [2023-11-26 11:55:14,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502322096] [2023-11-26 11:55:14,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:14,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:55:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:55:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:55:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-26 11:55:14,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 468 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 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 11:55:14,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:14,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-26 11:55:14,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:15,167 INFO L124 PetriNetUnfolderBase]: 247/500 cut-off events. [2023-11-26 11:55:15,167 INFO L125 PetriNetUnfolderBase]: For 1073/1081 co-relation queries the response was YES. [2023-11-26 11:55:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1900 conditions, 500 events. 247/500 cut-off events. For 1073/1081 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2288 event pairs, 53 based on Foata normal form. 9/506 useless extension candidates. Maximal degree in co-relation 1866. Up to 353 conditions per place. [2023-11-26 11:55:15,174 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 61 selfloop transitions, 22 changer transitions 1/89 dead transitions. [2023-11-26 11:55:15,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 765 flow [2023-11-26 11:55:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:55:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2023-11-26 11:55:15,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-26 11:55:15,177 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 99 transitions. [2023-11-26 11:55:15,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 99 transitions. [2023-11-26 11:55:15,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:15,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 99 transitions. [2023-11-26 11:55:15,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 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 11:55:15,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:15,182 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:15,182 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 468 flow. Second operand 9 states and 99 transitions. [2023-11-26 11:55:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 765 flow [2023-11-26 11:55:15,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 705 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:15,194 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 559 flow [2023-11-26 11:55:15,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=559, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-11-26 11:55:15,197 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2023-11-26 11:55:15,197 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 559 flow [2023-11-26 11:55:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 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 11:55:15,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:15,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:15,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:15,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:15,406 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 11:55:15,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1717928260, now seen corresponding path program 4 times [2023-11-26 11:55:15,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:15,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579423694] [2023-11-26 11:55:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:16,007 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 11:55:16,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579423694] [2023-11-26 11:55:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579423694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768719153] [2023-11-26 11:55:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:55:16,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:16,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:16,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:55:16,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:55:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:16,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:55:16,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:16,159 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 11:55:16,267 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 11:55:16,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:16,365 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 11:55:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768719153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:16,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 13 [2023-11-26 11:55:16,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882186335] [2023-11-26 11:55:16,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:16,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:55:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:55:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:55:16,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-26 11:55:16,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 559 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 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 11:55:16,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:16,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-26 11:55:16,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:16,826 INFO L124 PetriNetUnfolderBase]: 287/580 cut-off events. [2023-11-26 11:55:16,827 INFO L125 PetriNetUnfolderBase]: For 1219/1223 co-relation queries the response was YES. [2023-11-26 11:55:16,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 580 events. 287/580 cut-off events. For 1219/1223 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2790 event pairs, 58 based on Foata normal form. 5/581 useless extension candidates. Maximal degree in co-relation 2159. Up to 361 conditions per place. [2023-11-26 11:55:16,835 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 63 selfloop transitions, 36 changer transitions 1/105 dead transitions. [2023-11-26 11:55:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 914 flow [2023-11-26 11:55:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2023-11-26 11:55:16,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444 [2023-11-26 11:55:16,837 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 111 transitions. [2023-11-26 11:55:16,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 111 transitions. [2023-11-26 11:55:16,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:16,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 111 transitions. [2023-11-26 11:55:16,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 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 11:55:16,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 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 11:55:16,840 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 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 11:55:16,840 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 559 flow. Second operand 10 states and 111 transitions. [2023-11-26 11:55:16,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 914 flow [2023-11-26 11:55:16,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 902 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:16,854 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 739 flow [2023-11-26 11:55:16,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2023-11-26 11:55:16,856 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2023-11-26 11:55:16,856 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 739 flow [2023-11-26 11:55:16,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 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 11:55:16,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:16,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:16,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:17,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:17,074 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 11:55:17,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:17,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1921342962, now seen corresponding path program 5 times [2023-11-26 11:55:17,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:17,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315613951] [2023-11-26 11:55:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:17,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:17,636 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 11:55:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315613951] [2023-11-26 11:55:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315613951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313390503] [2023-11-26 11:55:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:55:17,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:17,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:17,638 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:17,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:55:17,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:55:17,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:17,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:55:17,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:17,780 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 11:55:18,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:18,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-26 11:55:18,200 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 11:55:18,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:18,431 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 11:55:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313390503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:18,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 22 [2023-11-26 11:55:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310986331] [2023-11-26 11:55:18,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:55:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:55:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:55:18,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-26 11:55:18,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 739 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 11:55:18,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:18,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-26 11:55:18,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:21,069 INFO L124 PetriNetUnfolderBase]: 960/1659 cut-off events. [2023-11-26 11:55:21,070 INFO L125 PetriNetUnfolderBase]: For 3838/3838 co-relation queries the response was YES. [2023-11-26 11:55:21,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 1659 events. 960/1659 cut-off events. For 3838/3838 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8339 event pairs, 79 based on Foata normal form. 2/1661 useless extension candidates. Maximal degree in co-relation 6544. Up to 597 conditions per place. [2023-11-26 11:55:21,091 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 158 selfloop transitions, 152 changer transitions 5/316 dead transitions. [2023-11-26 11:55:21,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 316 transitions, 2746 flow [2023-11-26 11:55:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-26 11:55:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-26 11:55:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 344 transitions. [2023-11-26 11:55:21,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528205128205128 [2023-11-26 11:55:21,096 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 344 transitions. [2023-11-26 11:55:21,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 344 transitions. [2023-11-26 11:55:21,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:21,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 344 transitions. [2023-11-26 11:55:21,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 8.820512820512821) internal successors, (344), 39 states have internal predecessors, (344), 0 states have call successors, (0), 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 11:55:21,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 25.0) internal successors, (1000), 40 states have internal predecessors, (1000), 0 states have call successors, (0), 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 11:55:21,102 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 25.0) internal successors, (1000), 40 states have internal predecessors, (1000), 0 states have call successors, (0), 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 11:55:21,103 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 739 flow. Second operand 39 states and 344 transitions. [2023-11-26 11:55:21,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 316 transitions, 2746 flow [2023-11-26 11:55:21,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 316 transitions, 2576 flow, removed 83 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:21,137 INFO L231 Difference]: Finished difference. Result has 123 places, 200 transitions, 2088 flow [2023-11-26 11:55:21,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2088, PETRI_PLACES=123, PETRI_TRANSITIONS=200} [2023-11-26 11:55:21,138 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 97 predicate places. [2023-11-26 11:55:21,138 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 200 transitions, 2088 flow [2023-11-26 11:55:21,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 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 11:55:21,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:21,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:21,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:55:21,346 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:21,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 477707350, now seen corresponding path program 6 times [2023-11-26 11:55:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:21,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152313555] [2023-11-26 11:55:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:21,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152313555] [2023-11-26 11:55:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152313555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536439658] [2023-11-26 11:55:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:55:21,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:21,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:21,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:55:21,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:55:21,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:21,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:21,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:21,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536439658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:21,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-26 11:55:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061781171] [2023-11-26 11:55:21,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:55:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:55:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:55:21,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:21,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 200 transitions, 2088 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 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 11:55:21,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:21,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:21,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:22,720 INFO L124 PetriNetUnfolderBase]: 1279/2495 cut-off events. [2023-11-26 11:55:22,723 INFO L125 PetriNetUnfolderBase]: For 13486/13661 co-relation queries the response was YES. [2023-11-26 11:55:22,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13110 conditions, 2495 events. 1279/2495 cut-off events. For 13486/13661 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15824 event pairs, 441 based on Foata normal form. 79/2566 useless extension candidates. Maximal degree in co-relation 12734. Up to 1298 conditions per place. [2023-11-26 11:55:22,766 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 317 selfloop transitions, 42 changer transitions 7/376 dead transitions. [2023-11-26 11:55:22,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 376 transitions, 4623 flow [2023-11-26 11:55:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:55:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2023-11-26 11:55:22,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2023-11-26 11:55:22,768 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 83 transitions. [2023-11-26 11:55:22,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 83 transitions. [2023-11-26 11:55:22,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:22,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 83 transitions. [2023-11-26 11:55:22,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 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 11:55:22,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 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 11:55:22,771 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 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 11:55:22,772 INFO L175 Difference]: Start difference. First operand has 123 places, 200 transitions, 2088 flow. Second operand 7 states and 83 transitions. [2023-11-26 11:55:22,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 376 transitions, 4623 flow [2023-11-26 11:55:22,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 376 transitions, 4180 flow, removed 219 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:22,923 INFO L231 Difference]: Finished difference. Result has 131 places, 240 transitions, 2531 flow [2023-11-26 11:55:22,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2531, PETRI_PLACES=131, PETRI_TRANSITIONS=240} [2023-11-26 11:55:22,926 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 105 predicate places. [2023-11-26 11:55:22,926 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 240 transitions, 2531 flow [2023-11-26 11:55:22,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 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 11:55:22,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:22,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:22,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:55:23,134 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:23,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1593036817, now seen corresponding path program 7 times [2023-11-26 11:55:23,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:23,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113943670] [2023-11-26 11:55:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:23,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113943670] [2023-11-26 11:55:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113943670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986138467] [2023-11-26 11:55:23,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:55:23,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:23,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:23,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:55:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:23,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:23,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:23,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:23,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986138467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:23,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:23,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-26 11:55:23,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764211967] [2023-11-26 11:55:23,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:23,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:55:23,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:23,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:55:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:55:23,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:23,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 240 transitions, 2531 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 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 11:55:23,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:23,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:23,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:24,413 INFO L124 PetriNetUnfolderBase]: 1022/1944 cut-off events. [2023-11-26 11:55:24,414 INFO L125 PetriNetUnfolderBase]: For 11330/11408 co-relation queries the response was YES. [2023-11-26 11:55:24,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10056 conditions, 1944 events. 1022/1944 cut-off events. For 11330/11408 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11338 event pairs, 402 based on Foata normal form. 118/2054 useless extension candidates. Maximal degree in co-relation 9805. Up to 1374 conditions per place. [2023-11-26 11:55:24,440 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 188 selfloop transitions, 3 changer transitions 92/293 dead transitions. [2023-11-26 11:55:24,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 293 transitions, 3545 flow [2023-11-26 11:55:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:55:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2023-11-26 11:55:24,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2023-11-26 11:55:24,443 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2023-11-26 11:55:24,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2023-11-26 11:55:24,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:24,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2023-11-26 11:55:24,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 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 11:55:24,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 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 11:55:24,445 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 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 11:55:24,445 INFO L175 Difference]: Start difference. First operand has 131 places, 240 transitions, 2531 flow. Second operand 7 states and 82 transitions. [2023-11-26 11:55:24,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 293 transitions, 3545 flow [2023-11-26 11:55:24,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 293 transitions, 3501 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:24,527 INFO L231 Difference]: Finished difference. Result has 138 places, 201 transitions, 1990 flow [2023-11-26 11:55:24,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1990, PETRI_PLACES=138, PETRI_TRANSITIONS=201} [2023-11-26 11:55:24,529 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 112 predicate places. [2023-11-26 11:55:24,529 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 201 transitions, 1990 flow [2023-11-26 11:55:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 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 11:55:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:24,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:24,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:24,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:24,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:24,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:24,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1518914974, now seen corresponding path program 8 times [2023-11-26 11:55:24,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:24,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930240618] [2023-11-26 11:55:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:24,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:24,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930240618] [2023-11-26 11:55:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930240618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93965944] [2023-11-26 11:55:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:24,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:24,902 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:24,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:55:25,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:55:25,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:25,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:25,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:25,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93965944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:25,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:25,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-26 11:55:25,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720774231] [2023-11-26 11:55:25,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:25,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:55:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:55:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:55:25,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:25,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 201 transitions, 1990 flow. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 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 11:55:25,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:25,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:25,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:25,811 INFO L124 PetriNetUnfolderBase]: 775/1415 cut-off events. [2023-11-26 11:55:25,812 INFO L125 PetriNetUnfolderBase]: For 9015/9101 co-relation queries the response was YES. [2023-11-26 11:55:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7375 conditions, 1415 events. 775/1415 cut-off events. For 9015/9101 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7311 event pairs, 93 based on Foata normal form. 130/1538 useless extension candidates. Maximal degree in co-relation 7315. Up to 574 conditions per place. [2023-11-26 11:55:25,835 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 192 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2023-11-26 11:55:25,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 245 transitions, 2777 flow [2023-11-26 11:55:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:55:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-26 11:55:25,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2023-11-26 11:55:25,838 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-26 11:55:25,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-26 11:55:25,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:25,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-26 11:55:25,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 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 11:55:25,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:25,840 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:25,841 INFO L175 Difference]: Start difference. First operand has 138 places, 201 transitions, 1990 flow. Second operand 9 states and 86 transitions. [2023-11-26 11:55:25,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 245 transitions, 2777 flow [2023-11-26 11:55:25,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 245 transitions, 2563 flow, removed 78 selfloop flow, removed 12 redundant places. [2023-11-26 11:55:25,941 INFO L231 Difference]: Finished difference. Result has 129 places, 202 transitions, 1969 flow [2023-11-26 11:55:25,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=129, PETRI_TRANSITIONS=202} [2023-11-26 11:55:25,942 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 103 predicate places. [2023-11-26 11:55:25,943 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 202 transitions, 1969 flow [2023-11-26 11:55:25,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 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 11:55:25,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:25,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:25,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:26,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:26,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:26,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1877184865, now seen corresponding path program 9 times [2023-11-26 11:55:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:26,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997464395] [2023-11-26 11:55:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:26,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997464395] [2023-11-26 11:55:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997464395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999973010] [2023-11-26 11:55:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:55:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:26,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:26,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:55:26,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:55:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:26,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:26,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:26,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:55:26,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999973010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:26,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:26,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-26 11:55:26,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790730309] [2023-11-26 11:55:26,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:26,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:55:26,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:55:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:55:26,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:26,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 202 transitions, 1969 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 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 11:55:26,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:26,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:26,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:27,091 INFO L124 PetriNetUnfolderBase]: 634/1165 cut-off events. [2023-11-26 11:55:27,091 INFO L125 PetriNetUnfolderBase]: For 6085/6211 co-relation queries the response was YES. [2023-11-26 11:55:27,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 1165 events. 634/1165 cut-off events. For 6085/6211 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5821 event pairs, 53 based on Foata normal form. 68/1231 useless extension candidates. Maximal degree in co-relation 6128. Up to 442 conditions per place. [2023-11-26 11:55:27,122 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 168 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2023-11-26 11:55:27,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 216 transitions, 2493 flow [2023-11-26 11:55:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:55:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-26 11:55:27,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2023-11-26 11:55:27,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-26 11:55:27,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-26 11:55:27,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:27,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-26 11:55:27,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 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 11:55:27,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:27,132 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 11:55:27,132 INFO L175 Difference]: Start difference. First operand has 129 places, 202 transitions, 1969 flow. Second operand 9 states and 86 transitions. [2023-11-26 11:55:27,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 216 transitions, 2493 flow [2023-11-26 11:55:27,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 216 transitions, 2450 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-26 11:55:27,172 INFO L231 Difference]: Finished difference. Result has 128 places, 181 transitions, 1860 flow [2023-11-26 11:55:27,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1860, PETRI_PLACES=128, PETRI_TRANSITIONS=181} [2023-11-26 11:55:27,174 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 102 predicate places. [2023-11-26 11:55:27,174 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 181 transitions, 1860 flow [2023-11-26 11:55:27,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 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 11:55:27,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:27,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:27,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:27,382 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:27,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 722523545, now seen corresponding path program 10 times [2023-11-26 11:55:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611726829] [2023-11-26 11:55:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:28,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611726829] [2023-11-26 11:55:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611726829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873885881] [2023-11-26 11:55:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:55:28,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:28,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:28,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:55:28,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:55:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:28,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:55:28,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:29,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:29,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:29,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-26 11:55:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873885881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:29,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:29,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-26 11:55:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451658316] [2023-11-26 11:55:29,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 11:55:29,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 11:55:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:55:29,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:29,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 181 transitions, 1860 flow. Second operand has 32 states, 32 states have (on average 5.9375) internal successors, (190), 32 states have internal predecessors, (190), 0 states have call successors, (0), 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 11:55:29,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:29,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:29,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:32,594 INFO L124 PetriNetUnfolderBase]: 883/1649 cut-off events. [2023-11-26 11:55:32,595 INFO L125 PetriNetUnfolderBase]: For 8242/8346 co-relation queries the response was YES. [2023-11-26 11:55:32,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8809 conditions, 1649 events. 883/1649 cut-off events. For 8242/8346 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9056 event pairs, 25 based on Foata normal form. 7/1654 useless extension candidates. Maximal degree in co-relation 8742. Up to 733 conditions per place. [2023-11-26 11:55:32,615 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 167 selfloop transitions, 154 changer transitions 1/332 dead transitions. [2023-11-26 11:55:32,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 332 transitions, 3609 flow [2023-11-26 11:55:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:55:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 11:55:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 272 transitions. [2023-11-26 11:55:32,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38857142857142857 [2023-11-26 11:55:32,619 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 272 transitions. [2023-11-26 11:55:32,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 272 transitions. [2023-11-26 11:55:32,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:32,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 272 transitions. [2023-11-26 11:55:32,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 9.714285714285714) internal successors, (272), 28 states have internal predecessors, (272), 0 states have call successors, (0), 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 11:55:32,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:32,623 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:32,623 INFO L175 Difference]: Start difference. First operand has 128 places, 181 transitions, 1860 flow. Second operand 28 states and 272 transitions. [2023-11-26 11:55:32,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 332 transitions, 3609 flow [2023-11-26 11:55:32,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 332 transitions, 3602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:32,682 INFO L231 Difference]: Finished difference. Result has 160 places, 251 transitions, 3090 flow [2023-11-26 11:55:32,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3090, PETRI_PLACES=160, PETRI_TRANSITIONS=251} [2023-11-26 11:55:32,683 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-11-26 11:55:32,683 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 251 transitions, 3090 flow [2023-11-26 11:55:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.9375) internal successors, (190), 32 states have internal predecessors, (190), 0 states have call successors, (0), 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 11:55:32,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:32,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:32,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:32,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:32,890 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:32,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1882714087, now seen corresponding path program 11 times [2023-11-26 11:55:32,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:32,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338156287] [2023-11-26 11:55:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:33,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338156287] [2023-11-26 11:55:33,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338156287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972116239] [2023-11-26 11:55:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:55:33,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:33,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:33,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:55:33,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:55:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:33,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 11:55:33,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:34,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:34,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:34,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-26 11:55:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:34,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972116239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:34,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:34,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2023-11-26 11:55:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011011022] [2023-11-26 11:55:34,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:34,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 11:55:34,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 11:55:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:55:34,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-26 11:55:34,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 251 transitions, 3090 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 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 11:55:34,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:34,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-26 11:55:34,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:36,672 INFO L124 PetriNetUnfolderBase]: 990/1862 cut-off events. [2023-11-26 11:55:36,673 INFO L125 PetriNetUnfolderBase]: For 13263/13371 co-relation queries the response was YES. [2023-11-26 11:55:36,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11356 conditions, 1862 events. 990/1862 cut-off events. For 13263/13371 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10618 event pairs, 85 based on Foata normal form. 1/1857 useless extension candidates. Maximal degree in co-relation 11279. Up to 1378 conditions per place. [2023-11-26 11:55:36,696 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 250 selfloop transitions, 68 changer transitions 1/329 dead transitions. [2023-11-26 11:55:36,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 329 transitions, 4364 flow [2023-11-26 11:55:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:55:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 11:55:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 201 transitions. [2023-11-26 11:55:36,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38285714285714284 [2023-11-26 11:55:36,698 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 201 transitions. [2023-11-26 11:55:36,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 201 transitions. [2023-11-26 11:55:36,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:36,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 201 transitions. [2023-11-26 11:55:36,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.571428571428571) internal successors, (201), 21 states have internal predecessors, (201), 0 states have call successors, (0), 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 11:55:36,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 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 11:55:36,702 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 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 11:55:36,702 INFO L175 Difference]: Start difference. First operand has 160 places, 251 transitions, 3090 flow. Second operand 21 states and 201 transitions. [2023-11-26 11:55:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 329 transitions, 4364 flow [2023-11-26 11:55:36,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 329 transitions, 4174 flow, removed 59 selfloop flow, removed 12 redundant places. [2023-11-26 11:55:36,791 INFO L231 Difference]: Finished difference. Result has 175 places, 274 transitions, 3383 flow [2023-11-26 11:55:36,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3383, PETRI_PLACES=175, PETRI_TRANSITIONS=274} [2023-11-26 11:55:36,793 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 149 predicate places. [2023-11-26 11:55:36,793 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 274 transitions, 3383 flow [2023-11-26 11:55:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 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 11:55:36,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:36,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:36,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:36,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:37,000 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:37,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1674796613, now seen corresponding path program 12 times [2023-11-26 11:55:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:37,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568668691] [2023-11-26 11:55:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:37,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:37,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568668691] [2023-11-26 11:55:37,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568668691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:37,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567714666] [2023-11-26 11:55:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:55:37,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:37,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:37,571 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:37,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:55:37,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:55:37,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:37,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:55:37,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:37,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:38,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:38,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-26 11:55:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:38,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567714666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:38,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:38,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 21 [2023-11-26 11:55:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16088845] [2023-11-26 11:55:38,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:38,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:55:38,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:55:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:55:38,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-26 11:55:38,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 274 transitions, 3383 flow. Second operand has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 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 11:55:38,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:38,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-26 11:55:38,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:39,545 INFO L124 PetriNetUnfolderBase]: 941/1843 cut-off events. [2023-11-26 11:55:39,545 INFO L125 PetriNetUnfolderBase]: For 14380/14530 co-relation queries the response was YES. [2023-11-26 11:55:39,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11555 conditions, 1843 events. 941/1843 cut-off events. For 14380/14530 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11092 event pairs, 104 based on Foata normal form. 13/1841 useless extension candidates. Maximal degree in co-relation 11473. Up to 1317 conditions per place. [2023-11-26 11:55:39,569 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 230 selfloop transitions, 64 changer transitions 1/326 dead transitions. [2023-11-26 11:55:39,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 326 transitions, 4401 flow [2023-11-26 11:55:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:55:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:55:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 165 transitions. [2023-11-26 11:55:39,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2023-11-26 11:55:39,572 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 165 transitions. [2023-11-26 11:55:39,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 165 transitions. [2023-11-26 11:55:39,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:39,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 165 transitions. [2023-11-26 11:55:39,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.3125) internal successors, (165), 16 states have internal predecessors, (165), 0 states have call successors, (0), 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 11:55:39,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 25.0) internal successors, (425), 17 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,575 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 25.0) internal successors, (425), 17 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:39,575 INFO L175 Difference]: Start difference. First operand has 175 places, 274 transitions, 3383 flow. Second operand 16 states and 165 transitions. [2023-11-26 11:55:39,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 326 transitions, 4401 flow [2023-11-26 11:55:39,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 326 transitions, 4316 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-26 11:55:39,677 INFO L231 Difference]: Finished difference. Result has 183 places, 294 transitions, 3774 flow [2023-11-26 11:55:39,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3774, PETRI_PLACES=183, PETRI_TRANSITIONS=294} [2023-11-26 11:55:39,678 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 157 predicate places. [2023-11-26 11:55:39,678 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 294 transitions, 3774 flow [2023-11-26 11:55:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 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 11:55:39,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:39,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:39,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:39,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:55:39,886 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:39,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1454816735, now seen corresponding path program 13 times [2023-11-26 11:55:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789429916] [2023-11-26 11:55:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:40,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789429916] [2023-11-26 11:55:40,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789429916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361609169] [2023-11-26 11:55:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:55:40,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:40,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:40,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:55:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:40,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:55:40,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:41,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:41,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:41,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-26 11:55:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:55:41,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361609169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:41,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:41,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-26 11:55:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788955344] [2023-11-26 11:55:41,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 11:55:41,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 11:55:41,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:55:41,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-26 11:55:41,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 294 transitions, 3774 flow. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 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 11:55:41,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:41,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-26 11:55:41,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:44,161 INFO L124 PetriNetUnfolderBase]: 1589/2696 cut-off events. [2023-11-26 11:55:44,162 INFO L125 PetriNetUnfolderBase]: For 24012/24012 co-relation queries the response was YES. [2023-11-26 11:55:44,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17504 conditions, 2696 events. 1589/2696 cut-off events. For 24012/24012 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14376 event pairs, 180 based on Foata normal form. 1/2697 useless extension candidates. Maximal degree in co-relation 17419. Up to 2158 conditions per place. [2023-11-26 11:55:44,205 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 290 selfloop transitions, 114 changer transitions 1/406 dead transitions. [2023-11-26 11:55:44,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 406 transitions, 5695 flow [2023-11-26 11:55:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:55:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 11:55:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 234 transitions. [2023-11-26 11:55:44,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2023-11-26 11:55:44,214 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 234 transitions. [2023-11-26 11:55:44,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 234 transitions. [2023-11-26 11:55:44,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:44,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 234 transitions. [2023-11-26 11:55:44,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 0 states have call successors, (0), 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 11:55:44,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,223 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,223 INFO L175 Difference]: Start difference. First operand has 183 places, 294 transitions, 3774 flow. Second operand 28 states and 234 transitions. [2023-11-26 11:55:44,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 406 transitions, 5695 flow [2023-11-26 11:55:44,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 406 transitions, 5593 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-11-26 11:55:44,383 INFO L231 Difference]: Finished difference. Result has 211 places, 334 transitions, 4637 flow [2023-11-26 11:55:44,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4637, PETRI_PLACES=211, PETRI_TRANSITIONS=334} [2023-11-26 11:55:44,385 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 185 predicate places. [2023-11-26 11:55:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 334 transitions, 4637 flow [2023-11-26 11:55:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 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 11:55:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:44,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:44,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:44,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:55:44,598 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:55:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash 994815339, now seen corresponding path program 14 times [2023-11-26 11:55:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209140377] [2023-11-26 11:55:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:45,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:45,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209140377] [2023-11-26 11:55:45,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209140377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:45,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177107109] [2023-11-26 11:55:45,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:45,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:45,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:45,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:45,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8730e50-7c57-44ad-aebb-a8d161105cf3/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:55:45,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:55:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:45,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 11:55:45,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:46,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:46,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-26 11:55:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:46,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:46,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:55:46,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 53 [2023-11-26 11:55:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:47,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177107109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:47,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:47,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2023-11-26 11:55:47,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692128928] [2023-11-26 11:55:47,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-26 11:55:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-26 11:55:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2023-11-26 11:55:47,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-26 11:55:47,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 334 transitions, 4637 flow. Second operand has 41 states, 41 states have (on average 4.902439024390244) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 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 11:55:47,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:47,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-26 11:55:47,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand