./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl --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 d4ad0d0809306a534b821bfb65370b6441b48266d0d86b4699760a422c08b963 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:15:46,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:15:46,773 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:15:46,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:15:46,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:15:46,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:15:46,817 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:15:46,818 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:15:46,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:15:46,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:15:46,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:15:46,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:15:46,827 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:15:46,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:15:46,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:15:46,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:15:46,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:15:46,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:15:46,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:15:46,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:15:46,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:15:46,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:15:46,835 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:15:46,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:15:46,836 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:15:46,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:15:46,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:15:46,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:15:46,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:46,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:15:46,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:15:46,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:15:46,841 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:15:46,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:15:46,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:15:46,842 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:15:46,843 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:15:46,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:15:46,843 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:15:46,843 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_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4ad0d0809306a534b821bfb65370b6441b48266d0d86b4699760a422c08b963 [2023-11-12 02:15:47,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:15:47,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:15:47,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:15:47,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:15:47,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:15:47,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2023-11-12 02:15:50,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:15:50,924 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:15:50,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/sv-benchmarks/c/weaver/test-easy11.wvr.c [2023-11-12 02:15:50,933 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/data/ebc8b75d1/7150ad2cd7904b7c89d89d2d1980c058/FLAG5ae0b46bc [2023-11-12 02:15:50,948 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/data/ebc8b75d1/7150ad2cd7904b7c89d89d2d1980c058 [2023-11-12 02:15:50,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:15:50,953 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:15:50,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:50,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:15:50,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:15:50,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:50" (1/1) ... [2023-11-12 02:15:50,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70198c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:50, skipping insertion in model container [2023-11-12 02:15:50,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:50" (1/1) ... [2023-11-12 02:15:50,986 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:15:51,154 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_553c4677-be72-4f11-a7ae-1ce6ba5c8243/sv-benchmarks/c/weaver/test-easy11.wvr.c[2031,2044] [2023-11-12 02:15:51,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:51,172 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:15:51,194 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_553c4677-be72-4f11-a7ae-1ce6ba5c8243/sv-benchmarks/c/weaver/test-easy11.wvr.c[2031,2044] [2023-11-12 02:15:51,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:51,204 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:51,205 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:51,213 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:15:51,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51 WrapperNode [2023-11-12 02:15:51,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:51,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:51,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:15:51,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:15:51,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,249 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-12 02:15:51,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:51,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:15:51,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:15:51,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:15:51,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,269 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:15:51,289 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:15:51,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:15:51,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:15:51,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (1/1) ... [2023-11-12 02:15:51,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:51,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:15:51,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:15:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:15:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:15:51,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:15:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:15:51,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:15:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:15:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:15:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:15:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:15:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:15:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:15:51,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:15:51,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:15:51,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:15:51,381 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:15:51,511 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:15:51,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:15:51,693 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:15:51,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:15:51,701 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:15:51,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:51 BoogieIcfgContainer [2023-11-12 02:15:51,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:15:51,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:15:51,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:15:51,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:15:51,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:15:50" (1/3) ... [2023-11-12 02:15:51,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b535ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:51, skipping insertion in model container [2023-11-12 02:15:51,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:51" (2/3) ... [2023-11-12 02:15:51,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b535ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:51, skipping insertion in model container [2023-11-12 02:15:51,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:51" (3/3) ... [2023-11-12 02:15:51,716 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-11-12 02:15:51,726 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:15:51,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:15:51,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:15:51,739 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:15:51,828 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:15:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 186 flow [2023-11-12 02:15:51,922 INFO L124 PetriNetUnfolderBase]: 6/84 cut-off events. [2023-11-12 02:15:51,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:15:51,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-12 02:15:51,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 186 flow [2023-11-12 02:15:51,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2023-11-12 02:15:51,971 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:15:51,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 162 flow [2023-11-12 02:15:52,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 162 flow [2023-11-12 02:15:52,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 162 flow [2023-11-12 02:15:52,062 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-11-12 02:15:52,063 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:15:52,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-12 02:15:52,065 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-12 02:15:54,753 INFO L134 LiptonReduction]: Checked pairs total: 659 [2023-11-12 02:15:54,753 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-11-12 02:15:54,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:15:54,777 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;@423c4dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:15:54,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:15:54,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:15:54,784 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-12 02:15:54,784 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:15:54,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:54,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:54,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:54,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1873540470, now seen corresponding path program 1 times [2023-11-12 02:15:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:54,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944341027] [2023-11-12 02:15:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:55,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944341027] [2023-11-12 02:15:55,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944341027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:55,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:55,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924981810] [2023-11-12 02:15:55,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:55,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:55,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:55,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:55,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:55,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:56,061 INFO L124 PetriNetUnfolderBase]: 58/106 cut-off events. [2023-11-12 02:15:56,062 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:15:56,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 106 events. 58/106 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 247 event pairs, 11 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 180. Up to 48 conditions per place. [2023-11-12 02:15:56,065 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 26 selfloop transitions, 10 changer transitions 5/41 dead transitions. [2023-11-12 02:15:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 185 flow [2023-11-12 02:15:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 497 transitions. [2023-11-12 02:15:56,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2023-11-12 02:15:56,093 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 497 transitions. [2023-11-12 02:15:56,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 497 transitions. [2023-11-12 02:15:56,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:56,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 497 transitions. [2023-11-12 02:15:56,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.0) internal successors, (497), 7 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,116 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,119 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 497 transitions. [2023-11-12 02:15:56,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 185 flow [2023-11-12 02:15:56,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:15:56,126 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 101 flow [2023-11-12 02:15:56,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-11-12 02:15:56,132 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-12 02:15:56,133 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 101 flow [2023-11-12 02:15:56,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:15:56,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 883748920, now seen corresponding path program 2 times [2023-11-12 02:15:56,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:56,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698548357] [2023-11-12 02:15:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:56,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:56,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:56,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698548357] [2023-11-12 02:15:56,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698548357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:56,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:56,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:56,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503175000] [2023-11-12 02:15:56,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:56,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:56,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:56,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:56,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:56,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:56,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:56,706 INFO L124 PetriNetUnfolderBase]: 96/166 cut-off events. [2023-11-12 02:15:56,706 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-12 02:15:56,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 166 events. 96/166 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 470 event pairs, 11 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 499. Up to 69 conditions per place. [2023-11-12 02:15:56,714 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 39 selfloop transitions, 14 changer transitions 5/58 dead transitions. [2023-11-12 02:15:56,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 333 flow [2023-11-12 02:15:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 505 transitions. [2023-11-12 02:15:56,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624542124542125 [2023-11-12 02:15:56,723 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 505 transitions. [2023-11-12 02:15:56,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 505 transitions. [2023-11-12 02:15:56,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:56,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 505 transitions. [2023-11-12 02:15:56,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,737 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,738 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 101 flow. Second operand 7 states and 505 transitions. [2023-11-12 02:15:56,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 333 flow [2023-11-12 02:15:56,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 58 transitions, 325 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-12 02:15:56,746 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 198 flow [2023-11-12 02:15:56,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-11-12 02:15:56,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-12 02:15:56,748 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 198 flow [2023-11-12 02:15:56,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:56,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:56,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:56,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:15:56,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:56,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1705923722, now seen corresponding path program 3 times [2023-11-12 02:15:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012032199] [2023-11-12 02:15:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:56,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:56,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:56,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012032199] [2023-11-12 02:15:56,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012032199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:56,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:56,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:56,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185591173] [2023-11-12 02:15:56,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:56,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:56,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:57,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 156 [2023-11-12 02:15:57,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:57,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 156 [2023-11-12 02:15:57,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:57,244 INFO L124 PetriNetUnfolderBase]: 113/191 cut-off events. [2023-11-12 02:15:57,244 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-11-12 02:15:57,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 191 events. 113/191 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 541 event pairs, 12 based on Foata normal form. 1/192 useless extension candidates. Maximal degree in co-relation 760. Up to 108 conditions per place. [2023-11-12 02:15:57,248 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 35 selfloop transitions, 21 changer transitions 5/61 dead transitions. [2023-11-12 02:15:57,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 465 flow [2023-11-12 02:15:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2023-11-12 02:15:57,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44963369963369965 [2023-11-12 02:15:57,260 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2023-11-12 02:15:57,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2023-11-12 02:15:57,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:57,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2023-11-12 02:15:57,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,268 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,268 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 198 flow. Second operand 7 states and 491 transitions. [2023-11-12 02:15:57,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 465 flow [2023-11-12 02:15:57,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 425 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-12 02:15:57,279 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 329 flow [2023-11-12 02:15:57,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=329, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-12 02:15:57,281 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-12 02:15:57,286 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 329 flow [2023-11-12 02:15:57,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:57,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:15:57,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:57,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2052043392, now seen corresponding path program 4 times [2023-11-12 02:15:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207304738] [2023-11-12 02:15:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:57,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:57,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:57,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207304738] [2023-11-12 02:15:57,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207304738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:57,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:57,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350255939] [2023-11-12 02:15:57,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:57,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:57,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:57,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:57,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:57,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:57,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:57,785 INFO L124 PetriNetUnfolderBase]: 116/198 cut-off events. [2023-11-12 02:15:57,785 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-11-12 02:15:57,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 198 events. 116/198 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 581 event pairs, 13 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 863. Up to 117 conditions per place. [2023-11-12 02:15:57,789 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 38 selfloop transitions, 23 changer transitions 5/66 dead transitions. [2023-11-12 02:15:57,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 557 flow [2023-11-12 02:15:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2023-11-12 02:15:57,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597069597069597 [2023-11-12 02:15:57,793 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2023-11-12 02:15:57,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2023-11-12 02:15:57,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:57,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2023-11-12 02:15:57,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,799 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,799 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 329 flow. Second operand 7 states and 502 transitions. [2023-11-12 02:15:57,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 557 flow [2023-11-12 02:15:57,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 531 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-12 02:15:57,807 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 410 flow [2023-11-12 02:15:57,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-11-12 02:15:57,809 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-12 02:15:57,809 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 410 flow [2023-11-12 02:15:57,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:57,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:57,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:57,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:15:57,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:57,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 380760646, now seen corresponding path program 5 times [2023-11-12 02:15:57,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:57,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375060379] [2023-11-12 02:15:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:57,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:57,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375060379] [2023-11-12 02:15:57,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375060379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:57,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:57,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819679861] [2023-11-12 02:15:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:58,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:58,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:58,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:58,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:58,304 INFO L124 PetriNetUnfolderBase]: 115/199 cut-off events. [2023-11-12 02:15:58,304 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-11-12 02:15:58,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 199 events. 115/199 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 600 event pairs, 13 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 944. Up to 122 conditions per place. [2023-11-12 02:15:58,307 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 37 selfloop transitions, 23 changer transitions 5/65 dead transitions. [2023-11-12 02:15:58,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 609 flow [2023-11-12 02:15:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 500 transitions. [2023-11-12 02:15:58,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2023-11-12 02:15:58,311 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 500 transitions. [2023-11-12 02:15:58,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 500 transitions. [2023-11-12 02:15:58,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:58,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 500 transitions. [2023-11-12 02:15:58,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,316 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,317 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 410 flow. Second operand 7 states and 500 transitions. [2023-11-12 02:15:58,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 609 flow [2023-11-12 02:15:58,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 553 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-12 02:15:58,322 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 414 flow [2023-11-12 02:15:58,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-12 02:15:58,324 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-11-12 02:15:58,324 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 414 flow [2023-11-12 02:15:58,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:58,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:58,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:15:58,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:58,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1781746622, now seen corresponding path program 6 times [2023-11-12 02:15:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:58,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801811916] [2023-11-12 02:15:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:58,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801811916] [2023-11-12 02:15:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801811916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236383359] [2023-11-12 02:15:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:58,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 156 [2023-11-12 02:15:58,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:58,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 156 [2023-11-12 02:15:58,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:58,844 INFO L124 PetriNetUnfolderBase]: 119/207 cut-off events. [2023-11-12 02:15:58,844 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2023-11-12 02:15:58,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 207 events. 119/207 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 629 event pairs, 14 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 972. Up to 125 conditions per place. [2023-11-12 02:15:58,847 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 38 selfloop transitions, 22 changer transitions 6/66 dead transitions. [2023-11-12 02:15:58,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 625 flow [2023-11-12 02:15:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2023-11-12 02:15:58,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2023-11-12 02:15:58,851 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2023-11-12 02:15:58,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2023-11-12 02:15:58,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:58,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2023-11-12 02:15:58,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,857 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,857 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 414 flow. Second operand 7 states and 489 transitions. [2023-11-12 02:15:58,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 625 flow [2023-11-12 02:15:58,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 571 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-12 02:15:58,864 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 425 flow [2023-11-12 02:15:58,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-12 02:15:58,867 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-11-12 02:15:58,867 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 425 flow [2023-11-12 02:15:58,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:58,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:58,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:58,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:15:58,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:58,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1604787439, now seen corresponding path program 1 times [2023-11-12 02:15:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743825579] [2023-11-12 02:15:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:58,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:58,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:58,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743825579] [2023-11-12 02:15:58,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743825579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:58,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053387137] [2023-11-12 02:15:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:58,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:58,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:58,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:58,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:15:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:59,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:15:59,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:59,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:59,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053387137] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:59,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:15:59,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-11-12 02:15:59,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988521177] [2023-11-12 02:15:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:59,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:15:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:15:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:15:59,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:59,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:59,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:59,322 INFO L124 PetriNetUnfolderBase]: 126/223 cut-off events. [2023-11-12 02:15:59,322 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2023-11-12 02:15:59,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 223 events. 126/223 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 716 event pairs, 10 based on Foata normal form. 6/229 useless extension candidates. Maximal degree in co-relation 1062. Up to 102 conditions per place. [2023-11-12 02:15:59,326 INFO L140 encePairwiseOnDemand]: 151/156 looper letters, 60 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2023-11-12 02:15:59,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 733 flow [2023-11-12 02:15:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:15:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:15:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 365 transitions. [2023-11-12 02:15:59,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2023-11-12 02:15:59,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 365 transitions. [2023-11-12 02:15:59,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 365 transitions. [2023-11-12 02:15:59,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:59,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 365 transitions. [2023-11-12 02:15:59,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,333 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 425 flow. Second operand 5 states and 365 transitions. [2023-11-12 02:15:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 733 flow [2023-11-12 02:15:59,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 672 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-12 02:15:59,340 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 483 flow [2023-11-12 02:15:59,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-11-12 02:15:59,341 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-12 02:15:59,341 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 483 flow [2023-11-12 02:15:59,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:59,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:59,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:59,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:59,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:59,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1680884181, now seen corresponding path program 1 times [2023-11-12 02:15:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:59,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590140558] [2023-11-12 02:15:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590140558] [2023-11-12 02:15:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590140558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:59,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:59,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301432514] [2023-11-12 02:15:59,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:59,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:15:59,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:15:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:15:59,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:59,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 483 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:59,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:59,807 INFO L124 PetriNetUnfolderBase]: 122/219 cut-off events. [2023-11-12 02:15:59,807 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2023-11-12 02:15:59,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 219 events. 122/219 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 713 event pairs, 15 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 967. Up to 83 conditions per place. [2023-11-12 02:15:59,810 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 46 selfloop transitions, 24 changer transitions 4/74 dead transitions. [2023-11-12 02:15:59,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 713 flow [2023-11-12 02:15:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:15:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:15:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 501 transitions. [2023-11-12 02:15:59,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2023-11-12 02:15:59,814 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 501 transitions. [2023-11-12 02:15:59,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 501 transitions. [2023-11-12 02:15:59,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:59,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 501 transitions. [2023-11-12 02:15:59,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,820 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,820 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 483 flow. Second operand 7 states and 501 transitions. [2023-11-12 02:15:59,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 713 flow [2023-11-12 02:15:59,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 685 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-12 02:15:59,830 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 505 flow [2023-11-12 02:15:59,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-11-12 02:15:59,833 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-12 02:15:59,834 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 505 flow [2023-11-12 02:15:59,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:59,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:15:59,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:15:59,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -842902647, now seen corresponding path program 2 times [2023-11-12 02:15:59,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:59,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583693534] [2023-11-12 02:15:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:59,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:59,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583693534] [2023-11-12 02:15:59,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583693534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:59,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:59,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:59,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130451789] [2023-11-12 02:15:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:59,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:15:59,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:15:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:15:59,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:15:59,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 505 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:15:59,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:59,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:15:59,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:00,124 INFO L124 PetriNetUnfolderBase]: 134/241 cut-off events. [2023-11-12 02:16:00,125 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-11-12 02:16:00,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 241 events. 134/241 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 800 event pairs, 4 based on Foata normal form. 6/247 useless extension candidates. Maximal degree in co-relation 1152. Up to 167 conditions per place. [2023-11-12 02:16:00,128 INFO L140 encePairwiseOnDemand]: 151/156 looper letters, 58 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2023-11-12 02:16:00,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 813 flow [2023-11-12 02:16:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-11-12 02:16:00,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641025641025641 [2023-11-12 02:16:00,131 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-11-12 02:16:00,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-11-12 02:16:00,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:00,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-11-12 02:16:00,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,136 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,136 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 505 flow. Second operand 5 states and 362 transitions. [2023-11-12 02:16:00,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 813 flow [2023-11-12 02:16:00,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 740 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-12 02:16:00,150 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 547 flow [2023-11-12 02:16:00,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-12 02:16:00,151 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-11-12 02:16:00,151 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 547 flow [2023-11-12 02:16:00,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:00,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:16:00,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:00,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2035505535, now seen corresponding path program 2 times [2023-11-12 02:16:00,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:00,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211821480] [2023-11-12 02:16:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:00,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211821480] [2023-11-12 02:16:00,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211821480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014988226] [2023-11-12 02:16:00,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:00,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:00,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:00,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:16:00,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:00,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:16:00,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014988226] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:00,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:16:00,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-11-12 02:16:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201401725] [2023-11-12 02:16:00,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:00,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:16:00,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:00,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:00,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:00,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:00,562 INFO L124 PetriNetUnfolderBase]: 153/292 cut-off events. [2023-11-12 02:16:00,563 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2023-11-12 02:16:00,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1500 conditions, 292 events. 153/292 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1110 event pairs, 26 based on Foata normal form. 4/296 useless extension candidates. Maximal degree in co-relation 1340. Up to 156 conditions per place. [2023-11-12 02:16:00,566 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 65 selfloop transitions, 25 changer transitions 0/90 dead transitions. [2023-11-12 02:16:00,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 897 flow [2023-11-12 02:16:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:16:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:16:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 443 transitions. [2023-11-12 02:16:00,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732905982905983 [2023-11-12 02:16:00,569 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 443 transitions. [2023-11-12 02:16:00,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 443 transitions. [2023-11-12 02:16:00,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:00,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 443 transitions. [2023-11-12 02:16:00,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,574 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 547 flow. Second operand 6 states and 443 transitions. [2023-11-12 02:16:00,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 897 flow [2023-11-12 02:16:00,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 873 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:00,584 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 669 flow [2023-11-12 02:16:00,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=669, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-11-12 02:16:00,585 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-11-12 02:16:00,585 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 669 flow [2023-11-12 02:16:00,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:00,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:00,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:16:00,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:00,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash 863005005, now seen corresponding path program 3 times [2023-11-12 02:16:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734763834] [2023-11-12 02:16:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:00,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:00,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734763834] [2023-11-12 02:16:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734763834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:00,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:00,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351736410] [2023-11-12 02:16:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:00,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:00,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 669 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:00,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:00,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:00,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:01,109 INFO L124 PetriNetUnfolderBase]: 143/272 cut-off events. [2023-11-12 02:16:01,110 INFO L125 PetriNetUnfolderBase]: For 1488/1488 co-relation queries the response was YES. [2023-11-12 02:16:01,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 272 events. 143/272 cut-off events. For 1488/1488 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 992 event pairs, 19 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 1376. Up to 113 conditions per place. [2023-11-12 02:16:01,115 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 60 selfloop transitions, 25 changer transitions 3/88 dead transitions. [2023-11-12 02:16:01,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 936 flow [2023-11-12 02:16:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:16:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:16:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 575 transitions. [2023-11-12 02:16:01,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46073717948717946 [2023-11-12 02:16:01,119 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 575 transitions. [2023-11-12 02:16:01,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 575 transitions. [2023-11-12 02:16:01,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:01,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 575 transitions. [2023-11-12 02:16:01,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.875) internal successors, (575), 8 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,126 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,127 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 669 flow. Second operand 8 states and 575 transitions. [2023-11-12 02:16:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 936 flow [2023-11-12 02:16:01,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 895 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:01,142 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 648 flow [2023-11-12 02:16:01,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=648, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-11-12 02:16:01,143 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-11-12 02:16:01,143 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 648 flow [2023-11-12 02:16:01,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:01,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:01,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:16:01,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:01,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -890934141, now seen corresponding path program 3 times [2023-11-12 02:16:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108500225] [2023-11-12 02:16:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:01,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108500225] [2023-11-12 02:16:01,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108500225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:01,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:01,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907570775] [2023-11-12 02:16:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:01,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:01,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:01,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 648 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:01,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:01,478 INFO L124 PetriNetUnfolderBase]: 150/287 cut-off events. [2023-11-12 02:16:01,479 INFO L125 PetriNetUnfolderBase]: For 1600/1600 co-relation queries the response was YES. [2023-11-12 02:16:01,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 287 events. 150/287 cut-off events. For 1600/1600 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1076 event pairs, 4 based on Foata normal form. 2/289 useless extension candidates. Maximal degree in co-relation 1520. Up to 106 conditions per place. [2023-11-12 02:16:01,484 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 57 selfloop transitions, 23 changer transitions 1/81 dead transitions. [2023-11-12 02:16:01,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 955 flow [2023-11-12 02:16:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:16:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:16:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2023-11-12 02:16:01,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594017094017094 [2023-11-12 02:16:01,488 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 430 transitions. [2023-11-12 02:16:01,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 430 transitions. [2023-11-12 02:16:01,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:01,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 430 transitions. [2023-11-12 02:16:01,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.66666666666667) internal successors, (430), 6 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,496 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,496 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 648 flow. Second operand 6 states and 430 transitions. [2023-11-12 02:16:01,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 955 flow [2023-11-12 02:16:01,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 902 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:01,510 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 660 flow [2023-11-12 02:16:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2023-11-12 02:16:01,511 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 53 predicate places. [2023-11-12 02:16:01,511 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 660 flow [2023-11-12 02:16:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:01,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:01,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:16:01,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:01,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 151242901, now seen corresponding path program 4 times [2023-11-12 02:16:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:01,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609170861] [2023-11-12 02:16:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:01,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609170861] [2023-11-12 02:16:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609170861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067077435] [2023-11-12 02:16:01,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:16:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:01,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:01,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:16:01,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:16:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:01,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:16:01,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:01,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:01,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067077435] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:01,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:16:01,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-11-12 02:16:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816478382] [2023-11-12 02:16:01,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:01,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:01,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:01,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:16:01,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:01,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 660 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:01,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:01,952 INFO L124 PetriNetUnfolderBase]: 157/306 cut-off events. [2023-11-12 02:16:01,953 INFO L125 PetriNetUnfolderBase]: For 1880/1880 co-relation queries the response was YES. [2023-11-12 02:16:01,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 306 events. 157/306 cut-off events. For 1880/1880 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1174 event pairs, 11 based on Foata normal form. 8/314 useless extension candidates. Maximal degree in co-relation 1572. Up to 162 conditions per place. [2023-11-12 02:16:01,957 INFO L140 encePairwiseOnDemand]: 151/156 looper letters, 59 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2023-11-12 02:16:01,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 987 flow [2023-11-12 02:16:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-11-12 02:16:01,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46282051282051284 [2023-11-12 02:16:01,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-11-12 02:16:01,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-11-12 02:16:01,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:01,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-11-12 02:16:01,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,966 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 660 flow. Second operand 5 states and 361 transitions. [2023-11-12 02:16:01,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 987 flow [2023-11-12 02:16:01,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 923 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:01,979 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 763 flow [2023-11-12 02:16:01,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=763, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-12 02:16:01,980 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-11-12 02:16:01,980 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 763 flow [2023-11-12 02:16:01,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:01,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:01,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:01,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:16:02,189 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:02,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash 881911291, now seen corresponding path program 4 times [2023-11-12 02:16:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:02,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802218918] [2023-11-12 02:16:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:02,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802218918] [2023-11-12 02:16:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802218918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:02,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844670924] [2023-11-12 02:16:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:02,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:02,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:02,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 763 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:02,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:02,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:02,464 INFO L124 PetriNetUnfolderBase]: 149/290 cut-off events. [2023-11-12 02:16:02,464 INFO L125 PetriNetUnfolderBase]: For 2082/2082 co-relation queries the response was YES. [2023-11-12 02:16:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 290 events. 149/290 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1095 event pairs, 40 based on Foata normal form. 6/296 useless extension candidates. Maximal degree in co-relation 1520. Up to 212 conditions per place. [2023-11-12 02:16:02,468 INFO L140 encePairwiseOnDemand]: 151/156 looper letters, 58 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2023-11-12 02:16:02,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 982 flow [2023-11-12 02:16:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 364 transitions. [2023-11-12 02:16:02,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-12 02:16:02,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 364 transitions. [2023-11-12 02:16:02,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 364 transitions. [2023-11-12 02:16:02,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:02,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 364 transitions. [2023-11-12 02:16:02,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,475 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 763 flow. Second operand 5 states and 364 transitions. [2023-11-12 02:16:02,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 982 flow [2023-11-12 02:16:02,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 967 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:02,487 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 814 flow [2023-11-12 02:16:02,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=814, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2023-11-12 02:16:02,488 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-11-12 02:16:02,488 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 814 flow [2023-11-12 02:16:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:02,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:02,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:16:02,489 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:02,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 849205761, now seen corresponding path program 5 times [2023-11-12 02:16:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697495125] [2023-11-12 02:16:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697495125] [2023-11-12 02:16:02,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697495125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:02,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:02,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553380863] [2023-11-12 02:16:02,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:02,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:02,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 814 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:02,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:02,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:02,731 INFO L124 PetriNetUnfolderBase]: 147/288 cut-off events. [2023-11-12 02:16:02,731 INFO L125 PetriNetUnfolderBase]: For 2044/2044 co-relation queries the response was YES. [2023-11-12 02:16:02,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 288 events. 147/288 cut-off events. For 2044/2044 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1087 event pairs, 28 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 1424. Up to 108 conditions per place. [2023-11-12 02:16:02,736 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 53 selfloop transitions, 26 changer transitions 2/81 dead transitions. [2023-11-12 02:16:02,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 1027 flow [2023-11-12 02:16:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2023-11-12 02:16:02,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542124542124542 [2023-11-12 02:16:02,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2023-11-12 02:16:02,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2023-11-12 02:16:02,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:02,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2023-11-12 02:16:02,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,746 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,747 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 814 flow. Second operand 7 states and 496 transitions. [2023-11-12 02:16:02,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 1027 flow [2023-11-12 02:16:02,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 954 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:02,761 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 749 flow [2023-11-12 02:16:02,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-11-12 02:16:02,763 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-11-12 02:16:02,764 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 749 flow [2023-11-12 02:16:02,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:02,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:02,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:16:02,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:02,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:02,765 INFO L85 PathProgramCache]: Analyzing trace with hash 521735753, now seen corresponding path program 5 times [2023-11-12 02:16:02,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:02,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416573008] [2023-11-12 02:16:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:02,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:02,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416573008] [2023-11-12 02:16:02,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416573008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:02,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:02,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970146621] [2023-11-12 02:16:02,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:02,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:02,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 749 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:02,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:02,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:02,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:03,117 INFO L124 PetriNetUnfolderBase]: 135/262 cut-off events. [2023-11-12 02:16:03,117 INFO L125 PetriNetUnfolderBase]: For 1700/1700 co-relation queries the response was YES. [2023-11-12 02:16:03,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 262 events. 135/262 cut-off events. For 1700/1700 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 939 event pairs, 9 based on Foata normal form. 4/266 useless extension candidates. Maximal degree in co-relation 1374. Up to 174 conditions per place. [2023-11-12 02:16:03,122 INFO L140 encePairwiseOnDemand]: 151/156 looper letters, 56 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2023-11-12 02:16:03,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 926 flow [2023-11-12 02:16:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-11-12 02:16:03,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641025641025641 [2023-11-12 02:16:03,127 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-11-12 02:16:03,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-11-12 02:16:03,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:03,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-11-12 02:16:03,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,135 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,136 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 749 flow. Second operand 5 states and 362 transitions. [2023-11-12 02:16:03,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 926 flow [2023-11-12 02:16:03,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 899 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:03,150 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 746 flow [2023-11-12 02:16:03,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=746, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2023-11-12 02:16:03,151 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-11-12 02:16:03,151 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 746 flow [2023-11-12 02:16:03,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:03,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:03,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:16:03,152 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:03,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:03,153 INFO L85 PathProgramCache]: Analyzing trace with hash -799647683, now seen corresponding path program 6 times [2023-11-12 02:16:03,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:03,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115560878] [2023-11-12 02:16:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:03,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:03,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115560878] [2023-11-12 02:16:03,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115560878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:03,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:03,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693681873] [2023-11-12 02:16:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:03,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:03,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 746 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:03,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:03,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:03,442 INFO L124 PetriNetUnfolderBase]: 125/242 cut-off events. [2023-11-12 02:16:03,442 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2023-11-12 02:16:03,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 242 events. 125/242 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 840 event pairs, 9 based on Foata normal form. 4/246 useless extension candidates. Maximal degree in co-relation 1248. Up to 111 conditions per place. [2023-11-12 02:16:03,446 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 56 selfloop transitions, 19 changer transitions 1/76 dead transitions. [2023-11-12 02:16:03,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 76 transitions, 950 flow [2023-11-12 02:16:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:16:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:16:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2023-11-12 02:16:03,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594017094017094 [2023-11-12 02:16:03,450 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 430 transitions. [2023-11-12 02:16:03,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 430 transitions. [2023-11-12 02:16:03,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:03,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 430 transitions. [2023-11-12 02:16:03,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.66666666666667) internal successors, (430), 6 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,455 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,456 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 746 flow. Second operand 6 states and 430 transitions. [2023-11-12 02:16:03,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 76 transitions, 950 flow [2023-11-12 02:16:03,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 927 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:03,468 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 724 flow [2023-11-12 02:16:03,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2023-11-12 02:16:03,469 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-12 02:16:03,470 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 724 flow [2023-11-12 02:16:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:03,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:03,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:16:03,471 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:03,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1741380467, now seen corresponding path program 6 times [2023-11-12 02:16:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608307234] [2023-11-12 02:16:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:03,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:03,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608307234] [2023-11-12 02:16:03,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608307234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:03,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:03,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41525503] [2023-11-12 02:16:03,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2023-11-12 02:16:03,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 724 flow. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:03,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2023-11-12 02:16:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:03,804 INFO L124 PetriNetUnfolderBase]: 120/225 cut-off events. [2023-11-12 02:16:03,804 INFO L125 PetriNetUnfolderBase]: For 1675/1675 co-relation queries the response was YES. [2023-11-12 02:16:03,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 225 events. 120/225 cut-off events. For 1675/1675 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 729 event pairs, 20 based on Foata normal form. 2/227 useless extension candidates. Maximal degree in co-relation 1328. Up to 104 conditions per place. [2023-11-12 02:16:03,808 INFO L140 encePairwiseOnDemand]: 150/156 looper letters, 54 selfloop transitions, 22 changer transitions 1/77 dead transitions. [2023-11-12 02:16:03,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 77 transitions, 938 flow [2023-11-12 02:16:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:16:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:16:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 567 transitions. [2023-11-12 02:16:03,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2023-11-12 02:16:03,811 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 567 transitions. [2023-11-12 02:16:03,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 567 transitions. [2023-11-12 02:16:03,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:03,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 567 transitions. [2023-11-12 02:16:03,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.875) internal successors, (567), 8 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,822 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,823 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 724 flow. Second operand 8 states and 567 transitions. [2023-11-12 02:16:03,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 77 transitions, 938 flow [2023-11-12 02:16:03,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 910 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:03,834 INFO L231 Difference]: Finished difference. Result has 83 places, 56 transitions, 699 flow [2023-11-12 02:16:03,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=699, PETRI_PLACES=83, PETRI_TRANSITIONS=56} [2023-11-12 02:16:03,835 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-12 02:16:03,835 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 56 transitions, 699 flow [2023-11-12 02:16:03,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:03,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:03,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:16:03,836 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:03,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1425896068, now seen corresponding path program 1 times [2023-11-12 02:16:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:03,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781545063] [2023-11-12 02:16:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:04,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781545063] [2023-11-12 02:16:04,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781545063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:04,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583740836] [2023-11-12 02:16:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:04,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:04,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:16:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:04,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:04,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:04,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:04,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583740836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:04,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:04,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:16:04,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908359707] [2023-11-12 02:16:04,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:16:04,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:16:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:16:05,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:05,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 56 transitions, 699 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:05,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:05,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:05,654 INFO L124 PetriNetUnfolderBase]: 122/228 cut-off events. [2023-11-12 02:16:05,655 INFO L125 PetriNetUnfolderBase]: For 1663/1663 co-relation queries the response was YES. [2023-11-12 02:16:05,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 228 events. 122/228 cut-off events. For 1663/1663 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 755 event pairs, 2 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 1220. Up to 51 conditions per place. [2023-11-12 02:16:05,659 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 42 selfloop transitions, 22 changer transitions 25/89 dead transitions. [2023-11-12 02:16:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 1040 flow [2023-11-12 02:16:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:16:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:16:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 741 transitions. [2023-11-12 02:16:05,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2023-11-12 02:16:05,664 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 741 transitions. [2023-11-12 02:16:05,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 741 transitions. [2023-11-12 02:16:05,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:05,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 741 transitions. [2023-11-12 02:16:05,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.36363636363636) internal successors, (741), 11 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,674 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,674 INFO L175 Difference]: Start difference. First operand has 83 places, 56 transitions, 699 flow. Second operand 11 states and 741 transitions. [2023-11-12 02:16:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 1040 flow [2023-11-12 02:16:05,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 957 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-12 02:16:05,687 INFO L231 Difference]: Finished difference. Result has 86 places, 48 transitions, 592 flow [2023-11-12 02:16:05,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=592, PETRI_PLACES=86, PETRI_TRANSITIONS=48} [2023-11-12 02:16:05,689 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-11-12 02:16:05,689 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 48 transitions, 592 flow [2023-11-12 02:16:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:05,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:05,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:05,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:05,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:05,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:05,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash -999051278, now seen corresponding path program 2 times [2023-11-12 02:16:05,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:05,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953244972] [2023-11-12 02:16:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:05,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:06,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953244972] [2023-11-12 02:16:06,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953244972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:06,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546167486] [2023-11-12 02:16:06,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:06,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:06,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:06,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:06,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:16:06,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:06,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:06,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546167486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:06,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:06,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-12 02:16:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420615279] [2023-11-12 02:16:06,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:06,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:16:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:16:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:16:07,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:07,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 48 transitions, 592 flow. Second operand has 19 states, 19 states have (on average 63.63157894736842) internal successors, (1209), 19 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:07,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:07,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:07,617 INFO L124 PetriNetUnfolderBase]: 96/188 cut-off events. [2023-11-12 02:16:07,618 INFO L125 PetriNetUnfolderBase]: For 1373/1373 co-relation queries the response was YES. [2023-11-12 02:16:07,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 188 events. 96/188 cut-off events. For 1373/1373 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 575 event pairs, 2 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 1122. Up to 47 conditions per place. [2023-11-12 02:16:07,622 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 46 selfloop transitions, 27 changer transitions 9/82 dead transitions. [2023-11-12 02:16:07,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 82 transitions, 949 flow [2023-11-12 02:16:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:16:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:16:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 740 transitions. [2023-11-12 02:16:07,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43123543123543123 [2023-11-12 02:16:07,626 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 740 transitions. [2023-11-12 02:16:07,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 740 transitions. [2023-11-12 02:16:07,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:07,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 740 transitions. [2023-11-12 02:16:07,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.27272727272727) internal successors, (740), 11 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,640 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,640 INFO L175 Difference]: Start difference. First operand has 86 places, 48 transitions, 592 flow. Second operand 11 states and 740 transitions. [2023-11-12 02:16:07,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 82 transitions, 949 flow [2023-11-12 02:16:07,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 823 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-11-12 02:16:07,652 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 590 flow [2023-11-12 02:16:07,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-11-12 02:16:07,653 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-11-12 02:16:07,653 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 590 flow [2023-11-12 02:16:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.63157894736842) internal successors, (1209), 19 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:07,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:07,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:07,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:07,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:07,869 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:07,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -923228378, now seen corresponding path program 3 times [2023-11-12 02:16:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:07,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968501841] [2023-11-12 02:16:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:07,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968501841] [2023-11-12 02:16:08,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968501841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654430078] [2023-11-12 02:16:08,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:16:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:08,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:08,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:08,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:16:08,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:16:08,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:08,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:08,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:08,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654430078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:08,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:08,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:16:08,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521867462] [2023-11-12 02:16:08,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:08,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:16:08,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:16:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:16:08,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:08,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 590 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:08,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:08,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:08,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:09,189 INFO L124 PetriNetUnfolderBase]: 90/183 cut-off events. [2023-11-12 02:16:09,189 INFO L125 PetriNetUnfolderBase]: For 1037/1037 co-relation queries the response was YES. [2023-11-12 02:16:09,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 183 events. 90/183 cut-off events. For 1037/1037 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 569 event pairs, 2 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 1029. Up to 47 conditions per place. [2023-11-12 02:16:09,191 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 34 selfloop transitions, 16 changer transitions 26/76 dead transitions. [2023-11-12 02:16:09,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 859 flow [2023-11-12 02:16:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:16:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:16:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 734 transitions. [2023-11-12 02:16:09,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42773892773892774 [2023-11-12 02:16:09,195 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 734 transitions. [2023-11-12 02:16:09,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 734 transitions. [2023-11-12 02:16:09,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:09,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 734 transitions. [2023-11-12 02:16:09,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 66.72727272727273) internal successors, (734), 11 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,201 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,201 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 590 flow. Second operand 11 states and 734 transitions. [2023-11-12 02:16:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 859 flow [2023-11-12 02:16:09,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 795 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-12 02:16:09,210 INFO L231 Difference]: Finished difference. Result has 82 places, 39 transitions, 436 flow [2023-11-12 02:16:09,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=436, PETRI_PLACES=82, PETRI_TRANSITIONS=39} [2023-11-12 02:16:09,211 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-11-12 02:16:09,211 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 39 transitions, 436 flow [2023-11-12 02:16:09,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:09,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:09,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:09,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:09,418 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:09,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1514225576, now seen corresponding path program 4 times [2023-11-12 02:16:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:09,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796688462] [2023-11-12 02:16:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:09,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796688462] [2023-11-12 02:16:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796688462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681605536] [2023-11-12 02:16:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:16:09,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:09,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:09,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:16:09,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:16:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:09,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:09,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:09,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:09,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681605536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:09,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:09,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:16:09,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444974435] [2023-11-12 02:16:09,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:16:09,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:16:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:10,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:10,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 39 transitions, 436 flow. Second operand has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:10,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:10,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:10,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:10,617 INFO L124 PetriNetUnfolderBase]: 73/155 cut-off events. [2023-11-12 02:16:10,617 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2023-11-12 02:16:10,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 155 events. 73/155 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 467 event pairs, 1 based on Foata normal form. 1/156 useless extension candidates. Maximal degree in co-relation 854. Up to 33 conditions per place. [2023-11-12 02:16:10,619 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 32 selfloop transitions, 30 changer transitions 12/74 dead transitions. [2023-11-12 02:16:10,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 799 flow [2023-11-12 02:16:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:16:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:16:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 993 transitions. [2023-11-12 02:16:10,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42435897435897435 [2023-11-12 02:16:10,623 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 993 transitions. [2023-11-12 02:16:10,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 993 transitions. [2023-11-12 02:16:10,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:10,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 993 transitions. [2023-11-12 02:16:10,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 66.2) internal successors, (993), 15 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:10,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 156.0) internal successors, (2496), 16 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:10,631 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 156.0) internal successors, (2496), 16 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:10,631 INFO L175 Difference]: Start difference. First operand has 82 places, 39 transitions, 436 flow. Second operand 15 states and 993 transitions. [2023-11-12 02:16:10,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 799 flow [2023-11-12 02:16:10,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 706 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-12 02:16:10,638 INFO L231 Difference]: Finished difference. Result has 78 places, 45 transitions, 510 flow [2023-11-12 02:16:10,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=510, PETRI_PLACES=78, PETRI_TRANSITIONS=45} [2023-11-12 02:16:10,639 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-12 02:16:10,639 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 45 transitions, 510 flow [2023-11-12 02:16:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:10,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:10,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:10,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:10,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:10,845 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:10,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash 654756400, now seen corresponding path program 5 times [2023-11-12 02:16:10,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:10,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660304188] [2023-11-12 02:16:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:10,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:11,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660304188] [2023-11-12 02:16:11,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660304188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866428070] [2023-11-12 02:16:11,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:16:11,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:11,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:11,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:11,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:16:11,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:11,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:11,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:16:11,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:11,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:11,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866428070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:11,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:11,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-11-12 02:16:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843588052] [2023-11-12 02:16:11,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:11,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:16:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:11,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:16:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:11,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 156 [2023-11-12 02:16:11,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 45 transitions, 510 flow. Second operand has 15 states, 15 states have (on average 64.66666666666667) internal successors, (970), 15 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:11,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 156 [2023-11-12 02:16:11,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:11,966 INFO L124 PetriNetUnfolderBase]: 66/145 cut-off events. [2023-11-12 02:16:11,966 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2023-11-12 02:16:11,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 145 events. 66/145 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 432 event pairs, 1 based on Foata normal form. 2/147 useless extension candidates. Maximal degree in co-relation 816. Up to 51 conditions per place. [2023-11-12 02:16:11,968 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 36 selfloop transitions, 21 changer transitions 10/67 dead transitions. [2023-11-12 02:16:11,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 67 transitions, 738 flow [2023-11-12 02:16:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:16:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:16:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2023-11-12 02:16:11,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321581196581197 [2023-11-12 02:16:11,972 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2023-11-12 02:16:11,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2023-11-12 02:16:11,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:11,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2023-11-12 02:16:11,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 67.41666666666667) internal successors, (809), 12 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,987 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,987 INFO L175 Difference]: Start difference. First operand has 78 places, 45 transitions, 510 flow. Second operand 12 states and 809 transitions. [2023-11-12 02:16:11,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 67 transitions, 738 flow [2023-11-12 02:16:11,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 67 transitions, 654 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-12 02:16:11,995 INFO L231 Difference]: Finished difference. Result has 81 places, 41 transitions, 431 flow [2023-11-12 02:16:11,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=431, PETRI_PLACES=81, PETRI_TRANSITIONS=41} [2023-11-12 02:16:11,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-11-12 02:16:11,996 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 41 transitions, 431 flow [2023-11-12 02:16:11,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.66666666666667) internal successors, (970), 15 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:11,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:11,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:12,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:16:12,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:16:12,203 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:12,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 578933500, now seen corresponding path program 6 times [2023-11-12 02:16:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:12,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627489890] [2023-11-12 02:16:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:12,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627489890] [2023-11-12 02:16:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627489890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156731381] [2023-11-12 02:16:12,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:16:12,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:12,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:12,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:12,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:16:12,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:16:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:12,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:12,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:12,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156731381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:12,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:12,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-12 02:16:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545138994] [2023-11-12 02:16:12,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:12,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:16:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:16:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:16:13,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:13,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 41 transitions, 431 flow. Second operand has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:13,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:13,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:13,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:13,992 INFO L124 PetriNetUnfolderBase]: 70/159 cut-off events. [2023-11-12 02:16:13,992 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2023-11-12 02:16:13,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 159 events. 70/159 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 514 event pairs, 3 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 874. Up to 35 conditions per place. [2023-11-12 02:16:13,995 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 32 selfloop transitions, 20 changer transitions 28/80 dead transitions. [2023-11-12 02:16:13,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 80 transitions, 780 flow [2023-11-12 02:16:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:16:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:16:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1124 transitions. [2023-11-12 02:16:13,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238310708898944 [2023-11-12 02:16:13,999 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1124 transitions. [2023-11-12 02:16:13,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1124 transitions. [2023-11-12 02:16:14,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:14,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1124 transitions. [2023-11-12 02:16:14,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.11764705882354) internal successors, (1124), 17 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:14,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 156.0) internal successors, (2808), 18 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:14,021 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 156.0) internal successors, (2808), 18 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:14,021 INFO L175 Difference]: Start difference. First operand has 81 places, 41 transitions, 431 flow. Second operand 17 states and 1124 transitions. [2023-11-12 02:16:14,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 80 transitions, 780 flow [2023-11-12 02:16:14,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 652 flow, removed 7 selfloop flow, removed 17 redundant places. [2023-11-12 02:16:14,032 INFO L231 Difference]: Finished difference. Result has 86 places, 40 transitions, 392 flow [2023-11-12 02:16:14,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=392, PETRI_PLACES=86, PETRI_TRANSITIONS=40} [2023-11-12 02:16:14,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-11-12 02:16:14,034 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 40 transitions, 392 flow [2023-11-12 02:16:14,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:14,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:14,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:14,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:14,249 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:14,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1441434708, now seen corresponding path program 7 times [2023-11-12 02:16:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:14,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934062460] [2023-11-12 02:16:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:14,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:14,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934062460] [2023-11-12 02:16:14,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934062460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:14,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375488709] [2023-11-12 02:16:14,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:16:14,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:14,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:14,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:14,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:16:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:14,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:14,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:14,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375488709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:14,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:14,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:16:14,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575520421] [2023-11-12 02:16:14,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:14,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:16:14,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:14,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:16:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:16:15,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:15,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 40 transitions, 392 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:15,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:15,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:15,549 INFO L124 PetriNetUnfolderBase]: 53/115 cut-off events. [2023-11-12 02:16:15,549 INFO L125 PetriNetUnfolderBase]: For 471/471 co-relation queries the response was YES. [2023-11-12 02:16:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 115 events. 53/115 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 301 event pairs, 3 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 615. Up to 32 conditions per place. [2023-11-12 02:16:15,551 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 25 selfloop transitions, 11 changer transitions 21/57 dead transitions. [2023-11-12 02:16:15,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 57 transitions, 576 flow [2023-11-12 02:16:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:16:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:16:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 724 transitions. [2023-11-12 02:16:15,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219114219114219 [2023-11-12 02:16:15,554 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 724 transitions. [2023-11-12 02:16:15,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 724 transitions. [2023-11-12 02:16:15,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:15,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 724 transitions. [2023-11-12 02:16:15,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.81818181818181) internal successors, (724), 11 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,560 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,561 INFO L175 Difference]: Start difference. First operand has 86 places, 40 transitions, 392 flow. Second operand 11 states and 724 transitions. [2023-11-12 02:16:15,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 57 transitions, 576 flow [2023-11-12 02:16:15,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 57 transitions, 527 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-11-12 02:16:15,567 INFO L231 Difference]: Finished difference. Result has 77 places, 28 transitions, 246 flow [2023-11-12 02:16:15,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=246, PETRI_PLACES=77, PETRI_TRANSITIONS=28} [2023-11-12 02:16:15,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-11-12 02:16:15,568 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 28 transitions, 246 flow [2023-11-12 02:16:15,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:15,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:15,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:15,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:15,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:16:15,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1484552078, now seen corresponding path program 8 times [2023-11-12 02:16:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:15,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083670910] [2023-11-12 02:16:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083670910] [2023-11-12 02:16:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083670910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562484927] [2023-11-12 02:16:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:15,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:15,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:15,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:16:16,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:16,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:16:16,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:16,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562484927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:16,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-12 02:16:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824265695] [2023-11-12 02:16:16,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:16:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:16:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:16:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 156 [2023-11-12 02:16:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 28 transitions, 246 flow. Second operand has 19 states, 19 states have (on average 63.63157894736842) internal successors, (1209), 19 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 156 [2023-11-12 02:16:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:17,096 INFO L124 PetriNetUnfolderBase]: 34/74 cut-off events. [2023-11-12 02:16:17,096 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-12 02:16:17,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 74 events. 34/74 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 3 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 383. Up to 21 conditions per place. [2023-11-12 02:16:17,097 INFO L140 encePairwiseOnDemand]: 148/156 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-11-12 02:16:17,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 36 transitions, 343 flow [2023-11-12 02:16:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:16:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:16:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 587 transitions. [2023-11-12 02:16:17,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180911680911681 [2023-11-12 02:16:17,100 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 587 transitions. [2023-11-12 02:16:17,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 587 transitions. [2023-11-12 02:16:17,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:17,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 587 transitions. [2023-11-12 02:16:17,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.22222222222223) internal successors, (587), 9 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:17,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:17,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:17,117 INFO L175 Difference]: Start difference. First operand has 77 places, 28 transitions, 246 flow. Second operand 9 states and 587 transitions. [2023-11-12 02:16:17,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 36 transitions, 343 flow [2023-11-12 02:16:17,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 36 transitions, 283 flow, removed 2 selfloop flow, removed 15 redundant places. [2023-11-12 02:16:17,121 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-11-12 02:16:17,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-11-12 02:16:17,121 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-11-12 02:16:17,122 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-11-12 02:16:17,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.63157894736842) internal successors, (1209), 19 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:16:17,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-12 02:16:17,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-12 02:16:17,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-12 02:16:17,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:16:17,335 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 6] [2023-11-12 02:16:17,340 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-12 02:16:17,341 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:16:17,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:16:17 BasicIcfg [2023-11-12 02:16:17,347 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:16:17,347 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:16:17,347 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:16:17,348 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:16:17,348 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:51" (3/4) ... [2023-11-12 02:16:17,351 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 02:16:17,357 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-12 02:16:17,357 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-12 02:16:17,365 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-12 02:16:17,366 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-12 02:16:17,366 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-12 02:16:17,366 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 02:16:17,475 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/witness.graphml [2023-11-12 02:16:17,478 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/witness.yml [2023-11-12 02:16:17,478 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:16:17,479 INFO L158 Benchmark]: Toolchain (without parser) took 26526.32ms. Allocated memory was 192.9MB in the beginning and 337.6MB in the end (delta: 144.7MB). Free memory was 147.1MB in the beginning and 209.8MB in the end (delta: -62.7MB). Peak memory consumption was 84.0MB. Max. memory is 16.1GB. [2023-11-12 02:16:17,479 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 125.8MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:16:17,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.44ms. Allocated memory is still 192.9MB. Free memory was 146.6MB in the beginning and 135.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 02:16:17,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.31ms. Allocated memory is still 192.9MB. Free memory was 135.7MB in the beginning and 134.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:16:17,481 INFO L158 Benchmark]: Boogie Preprocessor took 37.91ms. Allocated memory is still 192.9MB. Free memory was 134.0MB in the beginning and 132.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:16:17,481 INFO L158 Benchmark]: RCFGBuilder took 415.34ms. Allocated memory is still 192.9MB. Free memory was 132.7MB in the beginning and 120.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:16:17,482 INFO L158 Benchmark]: TraceAbstraction took 25639.24ms. Allocated memory was 192.9MB in the beginning and 337.6MB in the end (delta: 144.7MB). Free memory was 119.8MB in the beginning and 213.7MB in the end (delta: -93.9MB). Peak memory consumption was 54.6MB. Max. memory is 16.1GB. [2023-11-12 02:16:17,482 INFO L158 Benchmark]: Witness Printer took 130.95ms. Allocated memory is still 337.6MB. Free memory was 213.7MB in the beginning and 209.8MB in the end (delta: 4.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:16:17,489 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 125.8MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.44ms. Allocated memory is still 192.9MB. Free memory was 146.6MB in the beginning and 135.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.31ms. Allocated memory is still 192.9MB. Free memory was 135.7MB in the beginning and 134.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.91ms. Allocated memory is still 192.9MB. Free memory was 134.0MB in the beginning and 132.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 415.34ms. Allocated memory is still 192.9MB. Free memory was 132.7MB in the beginning and 120.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 25639.24ms. Allocated memory was 192.9MB in the beginning and 337.6MB in the end (delta: 144.7MB). Free memory was 119.8MB in the beginning and 213.7MB in the end (delta: -93.9MB). Peak memory consumption was 54.6MB. Max. memory is 16.1GB. * Witness Printer took 130.95ms. Allocated memory is still 337.6MB. Free memory was 213.7MB in the beginning and 209.8MB in the end (delta: 4.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 76 PlacesBefore, 20 PlacesAfterwards, 75 TransitionsBefore, 15 TransitionsAfterwards, 648 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 70 TotalNumberOfCompositions, 659 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 621, independent: 609, independent conditional: 0, independent unconditional: 609, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 351, independent: 349, independent conditional: 0, independent unconditional: 349, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 621, independent: 260, independent conditional: 0, independent unconditional: 260, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 351, unknown conditional: 0, unknown unconditional: 351] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 105 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.5s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 11.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2669 SdHoareTripleChecker+Valid, 7.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2072 mSDsluCounter, 2389 SdHoareTripleChecker+Invalid, 6.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2120 mSDsCounter, 315 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9155 IncrementalHoareTripleChecker+Invalid, 9470 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 315 mSolverCounterUnsat, 269 mSDtfsCounter, 9155 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 567 GetRequests, 276 SyntacticMatches, 5 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=814occurred in iteration=14, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 528 NumberOfCodeBlocks, 528 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 642 ConstructedInterpolants, 0 QuantifiedInterpolants, 3261 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1333 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 48 InterpolantComputations, 18 PerfectInterpolantSequences, 13/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 02:16:17,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553c4677-be72-4f11-a7ae-1ce6ba5c8243/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE