./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.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_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/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_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/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_02bde1a8-f44f-48e3-91fb-7d85303e1661/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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:57,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:57,783 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:57,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:57,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:57,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:57,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:57,832 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:57,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:57,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:57,840 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:57,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:57,841 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:57,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:57,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:57,844 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:57,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:57,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:57,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:57,846 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:57,846 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:57,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:57,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:57,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:57,850 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:57,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:57,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:57,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:57,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:57,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:57,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:57,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:57,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:57,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:57,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:57,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:57,854 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:57,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:57,855 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:57,855 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_02bde1a8-f44f-48e3-91fb-7d85303e1661/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2023-11-12 02:21:58,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:58,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:58,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:58,136 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:58,136 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:58,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-12 02:22:01,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:01,513 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:01,513 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-12 02:22:01,526 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/data/40363ba02/cb13428732fb46ebbf64d2e570845b75/FLAG37b378390 [2023-11-12 02:22:01,547 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/data/40363ba02/cb13428732fb46ebbf64d2e570845b75 [2023-11-12 02:22:01,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:01,552 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:01,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:01,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:01,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:01,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c4c5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01, skipping insertion in model container [2023-11-12 02:22:01,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,608 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:01,784 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_02bde1a8-f44f-48e3-91fb-7d85303e1661/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3384,3397] [2023-11-12 02:22:01,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:01,806 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:01,840 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_02bde1a8-f44f-48e3-91fb-7d85303e1661/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3384,3397] [2023-11-12 02:22:01,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:01,862 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:01,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01 WrapperNode [2023-11-12 02:22:01,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:01,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:01,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:01,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:01,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,915 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 187 [2023-11-12 02:22:01,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:01,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:01,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:01,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:01,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,953 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,960 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:01,961 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:01,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:01,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:01,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (1/1) ... [2023-11-12 02:22:01,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:02,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:02,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:02,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:22:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:22:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:22:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:22:02,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:22:02,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:22:02,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:22:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:22:02,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:22:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:22:02,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:02,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:02,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:22:02,084 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 02:22:02,242 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:02,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:02,812 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:02,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:02,826 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:22:02,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:02 BoogieIcfgContainer [2023-11-12 02:22:02,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:02,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:02,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:02,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:02,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:01" (1/3) ... [2023-11-12 02:22:02,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6253cc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:02, skipping insertion in model container [2023-11-12 02:22:02,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:01" (2/3) ... [2023-11-12 02:22:02,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6253cc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:02, skipping insertion in model container [2023-11-12 02:22:02,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:02" (3/3) ... [2023-11-12 02:22:02,841 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-11-12 02:22:02,850 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:22:02,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:02,859 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:22:02,859 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:22:03,005 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:22:03,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 324 transitions, 669 flow [2023-11-12 02:22:03,280 INFO L124 PetriNetUnfolderBase]: 29/321 cut-off events. [2023-11-12 02:22:03,281 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:03,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 29/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 405 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 253. Up to 3 conditions per place. [2023-11-12 02:22:03,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 324 transitions, 669 flow [2023-11-12 02:22:03,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 310 transitions, 638 flow [2023-11-12 02:22:03,319 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:22:03,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 310 transitions, 638 flow [2023-11-12 02:22:03,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 310 transitions, 638 flow [2023-11-12 02:22:03,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 310 transitions, 638 flow [2023-11-12 02:22:03,473 INFO L124 PetriNetUnfolderBase]: 29/310 cut-off events. [2023-11-12 02:22:03,474 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:03,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 310 events. 29/310 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 407 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 253. Up to 3 conditions per place. [2023-11-12 02:22:03,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 8448 [2023-11-12 02:22:15,480 INFO L134 LiptonReduction]: Checked pairs total: 10590 [2023-11-12 02:22:15,480 INFO L136 LiptonReduction]: Total number of compositions: 334 [2023-11-12 02:22:15,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:15,504 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;@6b642da2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:15,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:22:15,514 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:22:15,514 INFO L124 PetriNetUnfolderBase]: 11/38 cut-off events. [2023-11-12 02:22:15,514 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:15,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:15,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:15,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:15,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1884049329, now seen corresponding path program 1 times [2023-11-12 02:22:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:15,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039455719] [2023-11-12 02:22:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:16,182 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 02:22:16,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:16,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039455719] [2023-11-12 02:22:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039455719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:16,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:16,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408782189] [2023-11-12 02:22:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:16,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:16,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 658 [2023-11-12 02:22:16,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 02:22:16,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:16,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 658 [2023-11-12 02:22:16,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:16,653 INFO L124 PetriNetUnfolderBase]: 1270/1711 cut-off events. [2023-11-12 02:22:16,653 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-12 02:22:16,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3571 conditions, 1711 events. 1270/1711 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5671 event pairs, 585 based on Foata normal form. 1/1131 useless extension candidates. Maximal degree in co-relation 2914. Up to 1321 conditions per place. [2023-11-12 02:22:16,665 INFO L140 encePairwiseOnDemand]: 655/658 looper letters, 35 selfloop transitions, 0 changer transitions 26/61 dead transitions. [2023-11-12 02:22:16,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 277 flow [2023-11-12 02:22:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-11-12 02:22:16,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858156028368794 [2023-11-12 02:22:16,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-11-12 02:22:16,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-11-12 02:22:16,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:16,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-11-12 02:22:16,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 02:22:16,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 658.0) internal successors, (2632), 4 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states 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 02:22:16,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 658.0) internal successors, (2632), 4 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states 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 02:22:16,723 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 3 states and 959 transitions. [2023-11-12 02:22:16,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 277 flow [2023-11-12 02:22:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 255 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:22:16,734 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 78 flow [2023-11-12 02:22:16,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-12 02:22:16,740 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-12 02:22:16,741 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 78 flow [2023-11-12 02:22:16,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 02:22:16,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:16,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:16,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:22:16,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:16,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -216487244, now seen corresponding path program 1 times [2023-11-12 02:22:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:16,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491598520] [2023-11-12 02:22:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:17,644 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 02:22:17,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491598520] [2023-11-12 02:22:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491598520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:17,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159397712] [2023-11-12 02:22:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:17,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:17,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 658 [2023-11-12 02:22:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 02:22:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 658 [2023-11-12 02:22:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:18,130 INFO L124 PetriNetUnfolderBase]: 742/1039 cut-off events. [2023-11-12 02:22:18,130 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:22:18,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1039 events. 742/1039 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3790 event pairs, 47 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 2112. Up to 750 conditions per place. [2023-11-12 02:22:18,138 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 65 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2023-11-12 02:22:18,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 327 flow [2023-11-12 02:22:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1513 transitions. [2023-11-12 02:22:18,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987841945288754 [2023-11-12 02:22:18,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1513 transitions. [2023-11-12 02:22:18,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1513 transitions. [2023-11-12 02:22:18,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:18,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1513 transitions. [2023-11-12 02:22:18,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 302.6) internal successors, (1513), 5 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states 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 02:22:18,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:18,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:18,165 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 78 flow. Second operand 5 states and 1513 transitions. [2023-11-12 02:22:18,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 327 flow [2023-11-12 02:22:18,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 77 transitions, 323 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:18,169 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 91 flow [2023-11-12 02:22:18,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-12 02:22:18,170 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-12 02:22:18,171 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 91 flow [2023-11-12 02:22:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 02:22:18,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:18,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:22:18,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:18,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1254817704, now seen corresponding path program 2 times [2023-11-12 02:22:18,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:18,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639921903] [2023-11-12 02:22:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:18,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:19,079 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 02:22:19,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:19,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639921903] [2023-11-12 02:22:19,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639921903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:19,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:19,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124366165] [2023-11-12 02:22:19,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 658 [2023-11-12 02:22:19,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:19,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:19,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 658 [2023-11-12 02:22:19,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:19,599 INFO L124 PetriNetUnfolderBase]: 804/1161 cut-off events. [2023-11-12 02:22:19,600 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-11-12 02:22:19,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1161 events. 804/1161 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4132 event pairs, 393 based on Foata normal form. 1/929 useless extension candidates. Maximal degree in co-relation 2564. Up to 895 conditions per place. [2023-11-12 02:22:19,609 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 60 selfloop transitions, 3 changer transitions 10/73 dead transitions. [2023-11-12 02:22:19,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 73 transitions, 333 flow [2023-11-12 02:22:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1513 transitions. [2023-11-12 02:22:19,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987841945288754 [2023-11-12 02:22:19,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1513 transitions. [2023-11-12 02:22:19,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1513 transitions. [2023-11-12 02:22:19,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:19,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1513 transitions. [2023-11-12 02:22:19,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 302.6) internal successors, (1513), 5 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states 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 02:22:19,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:19,635 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:19,635 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 91 flow. Second operand 5 states and 1513 transitions. [2023-11-12 02:22:19,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 73 transitions, 333 flow [2023-11-12 02:22:19,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 324 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:19,640 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2023-11-12 02:22:19,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-12 02:22:19,642 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-12 02:22:19,645 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2023-11-12 02:22:19,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:19,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:19,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:19,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:22:19,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:19,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash 833427774, now seen corresponding path program 3 times [2023-11-12 02:22:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:19,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230685119] [2023-11-12 02:22:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:19,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:20,283 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 02:22:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230685119] [2023-11-12 02:22:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230685119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:20,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:20,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:20,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509357738] [2023-11-12 02:22:20,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:20,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:20,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 658 [2023-11-12 02:22:20,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 02:22:20,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:20,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 658 [2023-11-12 02:22:20,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:20,818 INFO L124 PetriNetUnfolderBase]: 884/1293 cut-off events. [2023-11-12 02:22:20,819 INFO L125 PetriNetUnfolderBase]: For 760/760 co-relation queries the response was YES. [2023-11-12 02:22:20,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1293 events. 884/1293 cut-off events. For 760/760 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5294 event pairs, 77 based on Foata normal form. 1/1033 useless extension candidates. Maximal degree in co-relation 3033. Up to 904 conditions per place. [2023-11-12 02:22:20,830 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 67 selfloop transitions, 3 changer transitions 11/81 dead transitions. [2023-11-12 02:22:20,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 81 transitions, 385 flow [2023-11-12 02:22:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1515 transitions. [2023-11-12 02:22:20,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048632218844987 [2023-11-12 02:22:20,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1515 transitions. [2023-11-12 02:22:20,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1515 transitions. [2023-11-12 02:22:20,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:20,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1515 transitions. [2023-11-12 02:22:20,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:22:20,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:20,856 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:20,856 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 5 states and 1515 transitions. [2023-11-12 02:22:20,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 81 transitions, 385 flow [2023-11-12 02:22:20,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 374 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:20,862 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 123 flow [2023-11-12 02:22:20,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-11-12 02:22:20,864 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-11-12 02:22:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 123 flow [2023-11-12 02:22:20,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.0) internal successors, (1455), 5 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states 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 02:22:20,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:20,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:20,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:22:20,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:20,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash -20081360, now seen corresponding path program 4 times [2023-11-12 02:22:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:20,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514345814] [2023-11-12 02:22:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:21,445 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 02:22:21,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514345814] [2023-11-12 02:22:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514345814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:21,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:21,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:21,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310711002] [2023-11-12 02:22:21,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:21,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:21,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:21,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 658 [2023-11-12 02:22:21,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:21,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:21,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 658 [2023-11-12 02:22:21,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:21,978 INFO L124 PetriNetUnfolderBase]: 983/1468 cut-off events. [2023-11-12 02:22:21,979 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2023-11-12 02:22:21,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1468 events. 983/1468 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5851 event pairs, 494 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 3591. Up to 1056 conditions per place. [2023-11-12 02:22:21,992 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 63 selfloop transitions, 4 changer transitions 11/78 dead transitions. [2023-11-12 02:22:21,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 398 flow [2023-11-12 02:22:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1515 transitions. [2023-11-12 02:22:21,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048632218844987 [2023-11-12 02:22:21,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1515 transitions. [2023-11-12 02:22:21,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1515 transitions. [2023-11-12 02:22:22,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:22,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1515 transitions. [2023-11-12 02:22:22,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:22:22,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:22,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:22,015 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 123 flow. Second operand 5 states and 1515 transitions. [2023-11-12 02:22:22,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 398 flow [2023-11-12 02:22:22,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 382 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:22,021 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 148 flow [2023-11-12 02:22:22,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-11-12 02:22:22,022 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-11-12 02:22:22,022 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 148 flow [2023-11-12 02:22:22,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:22,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:22,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:22,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:22:22,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:22,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1587505052, now seen corresponding path program 5 times [2023-11-12 02:22:22,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:22,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936675128] [2023-11-12 02:22:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:22,616 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 02:22:22,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936675128] [2023-11-12 02:22:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936675128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:22,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:22,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973942226] [2023-11-12 02:22:22,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:22,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:22,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:22,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:22,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 658 [2023-11-12 02:22:22,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:22,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:22,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 658 [2023-11-12 02:22:22,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:23,175 INFO L124 PetriNetUnfolderBase]: 977/1448 cut-off events. [2023-11-12 02:22:23,175 INFO L125 PetriNetUnfolderBase]: For 2049/2049 co-relation queries the response was YES. [2023-11-12 02:22:23,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3678 conditions, 1448 events. 977/1448 cut-off events. For 2049/2049 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5765 event pairs, 563 based on Foata normal form. 1/1156 useless extension candidates. Maximal degree in co-relation 3666. Up to 1179 conditions per place. [2023-11-12 02:22:23,189 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 65 selfloop transitions, 4 changer transitions 10/79 dead transitions. [2023-11-12 02:22:23,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 407 flow [2023-11-12 02:22:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1517 transitions. [2023-11-12 02:22:23,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46109422492401214 [2023-11-12 02:22:23,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1517 transitions. [2023-11-12 02:22:23,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1517 transitions. [2023-11-12 02:22:23,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:23,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1517 transitions. [2023-11-12 02:22:23,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.4) internal successors, (1517), 5 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 02:22:23,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:23,217 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:23,217 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 148 flow. Second operand 5 states and 1517 transitions. [2023-11-12 02:22:23,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 407 flow [2023-11-12 02:22:23,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 391 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:23,227 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 147 flow [2023-11-12 02:22:23,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-11-12 02:22:23,230 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-11-12 02:22:23,230 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 147 flow [2023-11-12 02:22:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:23,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:23,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:23,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:22:23,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:23,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash -196457498, now seen corresponding path program 6 times [2023-11-12 02:22:23,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:23,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095319780] [2023-11-12 02:22:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:24,061 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 02:22:24,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095319780] [2023-11-12 02:22:24,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095319780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:24,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:24,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:24,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262998765] [2023-11-12 02:22:24,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:24,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:24,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:24,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 658 [2023-11-12 02:22:24,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:24,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:24,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 658 [2023-11-12 02:22:24,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:24,628 INFO L124 PetriNetUnfolderBase]: 964/1423 cut-off events. [2023-11-12 02:22:24,628 INFO L125 PetriNetUnfolderBase]: For 1863/1863 co-relation queries the response was YES. [2023-11-12 02:22:24,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1423 events. 964/1423 cut-off events. For 1863/1863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5477 event pairs, 494 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 3579. Up to 1056 conditions per place. [2023-11-12 02:22:24,640 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 70 selfloop transitions, 3 changer transitions 10/83 dead transitions. [2023-11-12 02:22:24,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 420 flow [2023-11-12 02:22:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1521 transitions. [2023-11-12 02:22:24,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623100303951368 [2023-11-12 02:22:24,647 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1521 transitions. [2023-11-12 02:22:24,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1521 transitions. [2023-11-12 02:22:24,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:24,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1521 transitions. [2023-11-12 02:22:24,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.2) internal successors, (1521), 5 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states 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 02:22:24,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:24,662 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:24,663 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 147 flow. Second operand 5 states and 1521 transitions. [2023-11-12 02:22:24,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 420 flow [2023-11-12 02:22:24,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 83 transitions, 409 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:24,670 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 147 flow [2023-11-12 02:22:24,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-11-12 02:22:24,671 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-11-12 02:22:24,671 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 147 flow [2023-11-12 02:22:24,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.0) internal successors, (1460), 5 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states 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 02:22:24,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:24,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:24,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:22:24,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:24,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash 430638252, now seen corresponding path program 1 times [2023-11-12 02:22:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875308683] [2023-11-12 02:22:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:24,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:24,792 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 02:22:24,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:24,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875308683] [2023-11-12 02:22:24,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875308683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:24,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:24,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:24,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536547820] [2023-11-12 02:22:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:24,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:24,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:24,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 658 [2023-11-12 02:22:24,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:24,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:24,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 658 [2023-11-12 02:22:24,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:25,274 INFO L124 PetriNetUnfolderBase]: 1250/1858 cut-off events. [2023-11-12 02:22:25,274 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2023-11-12 02:22:25,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1858 events. 1250/1858 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8225 event pairs, 82 based on Foata normal form. 42/1511 useless extension candidates. Maximal degree in co-relation 4546. Up to 1135 conditions per place. [2023-11-12 02:22:25,289 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 70 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-12 02:22:25,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 413 flow [2023-11-12 02:22:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1245 transitions. [2023-11-12 02:22:25,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47302431610942247 [2023-11-12 02:22:25,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1245 transitions. [2023-11-12 02:22:25,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1245 transitions. [2023-11-12 02:22:25,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:25,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1245 transitions. [2023-11-12 02:22:25,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states 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 02:22:25,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:25,316 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 147 flow. Second operand 4 states and 1245 transitions. [2023-11-12 02:22:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 413 flow [2023-11-12 02:22:25,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 404 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:25,329 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 199 flow [2023-11-12 02:22:25,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-12 02:22:25,333 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-11-12 02:22:25,333 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 199 flow [2023-11-12 02:22:25,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:25,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:25,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:22:25,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:25,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1132697602, now seen corresponding path program 2 times [2023-11-12 02:22:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:25,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991196524] [2023-11-12 02:22:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:25,442 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 02:22:25,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991196524] [2023-11-12 02:22:25,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991196524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:25,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:25,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316682590] [2023-11-12 02:22:25,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:25,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:25,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 658 [2023-11-12 02:22:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 658 [2023-11-12 02:22:25,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:25,845 INFO L124 PetriNetUnfolderBase]: 1145/1709 cut-off events. [2023-11-12 02:22:25,845 INFO L125 PetriNetUnfolderBase]: For 2552/2552 co-relation queries the response was YES. [2023-11-12 02:22:25,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1709 events. 1145/1709 cut-off events. For 2552/2552 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7401 event pairs, 59 based on Foata normal form. 42/1388 useless extension candidates. Maximal degree in co-relation 4435. Up to 1028 conditions per place. [2023-11-12 02:22:25,859 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 72 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2023-11-12 02:22:25,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 496 flow [2023-11-12 02:22:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1243 transitions. [2023-11-12 02:22:25,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722644376899696 [2023-11-12 02:22:25,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1243 transitions. [2023-11-12 02:22:25,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1243 transitions. [2023-11-12 02:22:25,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:25,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1243 transitions. [2023-11-12 02:22:25,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 310.75) internal successors, (1243), 4 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states 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 02:22:25,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:25,877 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:25,877 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 199 flow. Second operand 4 states and 1243 transitions. [2023-11-12 02:22:25,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 496 flow [2023-11-12 02:22:25,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:22:25,884 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 284 flow [2023-11-12 02:22:25,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-11-12 02:22:25,886 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-11-12 02:22:25,886 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 284 flow [2023-11-12 02:22:25,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:25,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:25,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:22:25,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:25,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash 473700642, now seen corresponding path program 3 times [2023-11-12 02:22:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:25,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70652826] [2023-11-12 02:22:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:26,005 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 02:22:26,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:26,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70652826] [2023-11-12 02:22:26,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70652826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:26,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:26,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72794527] [2023-11-12 02:22:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:26,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:26,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 658 [2023-11-12 02:22:26,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:22:26,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:26,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 658 [2023-11-12 02:22:26,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:26,469 INFO L124 PetriNetUnfolderBase]: 1074/1594 cut-off events. [2023-11-12 02:22:26,469 INFO L125 PetriNetUnfolderBase]: For 3236/3236 co-relation queries the response was YES. [2023-11-12 02:22:26,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4566 conditions, 1594 events. 1074/1594 cut-off events. For 3236/3236 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6659 event pairs, 267 based on Foata normal form. 8/1265 useless extension candidates. Maximal degree in co-relation 4551. Up to 1264 conditions per place. [2023-11-12 02:22:26,483 INFO L140 encePairwiseOnDemand]: 653/658 looper letters, 68 selfloop transitions, 11 changer transitions 1/80 dead transitions. [2023-11-12 02:22:26,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 537 flow [2023-11-12 02:22:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1528 transitions. [2023-11-12 02:22:26,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644376899696049 [2023-11-12 02:22:26,491 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1528 transitions. [2023-11-12 02:22:26,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1528 transitions. [2023-11-12 02:22:26,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:26,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1528 transitions. [2023-11-12 02:22:26,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.6) internal successors, (1528), 5 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states 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 02:22:26,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:26,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:26,508 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 284 flow. Second operand 5 states and 1528 transitions. [2023-11-12 02:22:26,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 537 flow [2023-11-12 02:22:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 535 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-12 02:22:26,519 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 315 flow [2023-11-12 02:22:26,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2023-11-12 02:22:26,521 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-12 02:22:26,521 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 315 flow [2023-11-12 02:22:26,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:22:26,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:26,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:26,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:22:26,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:26,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2044713877, now seen corresponding path program 1 times [2023-11-12 02:22:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:26,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123299569] [2023-11-12 02:22:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:26,661 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 02:22:26,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123299569] [2023-11-12 02:22:26,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123299569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:26,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:26,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772575350] [2023-11-12 02:22:26,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:26,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:26,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:26,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:26,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 658 [2023-11-12 02:22:26,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:26,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:26,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 658 [2023-11-12 02:22:26,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:27,049 INFO L124 PetriNetUnfolderBase]: 1153/1725 cut-off events. [2023-11-12 02:22:27,049 INFO L125 PetriNetUnfolderBase]: For 4126/4126 co-relation queries the response was YES. [2023-11-12 02:22:27,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4902 conditions, 1725 events. 1153/1725 cut-off events. For 4126/4126 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7517 event pairs, 202 based on Foata normal form. 16/1366 useless extension candidates. Maximal degree in co-relation 4885. Up to 1402 conditions per place. [2023-11-12 02:22:27,065 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 65 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2023-11-12 02:22:27,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 547 flow [2023-11-12 02:22:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1236 transitions. [2023-11-12 02:22:27,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696048632218845 [2023-11-12 02:22:27,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1236 transitions. [2023-11-12 02:22:27,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1236 transitions. [2023-11-12 02:22:27,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:27,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1236 transitions. [2023-11-12 02:22:27,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 02:22:27,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:27,082 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:27,083 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 315 flow. Second operand 4 states and 1236 transitions. [2023-11-12 02:22:27,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 547 flow [2023-11-12 02:22:27,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 512 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-12 02:22:27,095 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 342 flow [2023-11-12 02:22:27,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-12 02:22:27,096 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-12 02:22:27,096 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 342 flow [2023-11-12 02:22:27,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:27,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:27,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:27,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:22:27,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:27,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1248577039, now seen corresponding path program 2 times [2023-11-12 02:22:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214115045] [2023-11-12 02:22:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:27,238 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 02:22:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214115045] [2023-11-12 02:22:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214115045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:27,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:27,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468747392] [2023-11-12 02:22:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:27,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 658 [2023-11-12 02:22:27,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 342 flow. Second operand has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:22:27,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:27,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 658 [2023-11-12 02:22:27,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:27,649 INFO L124 PetriNetUnfolderBase]: 1117/1667 cut-off events. [2023-11-12 02:22:27,650 INFO L125 PetriNetUnfolderBase]: For 2952/2952 co-relation queries the response was YES. [2023-11-12 02:22:27,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4870 conditions, 1667 events. 1117/1667 cut-off events. For 2952/2952 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7017 event pairs, 315 based on Foata normal form. 10/1316 useless extension candidates. Maximal degree in co-relation 4855. Up to 1247 conditions per place. [2023-11-12 02:22:27,667 INFO L140 encePairwiseOnDemand]: 653/658 looper letters, 71 selfloop transitions, 11 changer transitions 2/84 dead transitions. [2023-11-12 02:22:27,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 606 flow [2023-11-12 02:22:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1528 transitions. [2023-11-12 02:22:27,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644376899696049 [2023-11-12 02:22:27,674 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1528 transitions. [2023-11-12 02:22:27,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1528 transitions. [2023-11-12 02:22:27,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:27,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1528 transitions. [2023-11-12 02:22:27,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.6) internal successors, (1528), 5 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states 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 02:22:27,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:27,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:27,687 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 342 flow. Second operand 5 states and 1528 transitions. [2023-11-12 02:22:27,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 606 flow [2023-11-12 02:22:27,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 588 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:27,696 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 375 flow [2023-11-12 02:22:27,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-11-12 02:22:27,697 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-11-12 02:22:27,698 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 375 flow [2023-11-12 02:22:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:22:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:27,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:27,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:22:27,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:27,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1037358933, now seen corresponding path program 3 times [2023-11-12 02:22:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:27,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455271020] [2023-11-12 02:22:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:27,798 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 02:22:27,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455271020] [2023-11-12 02:22:27,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455271020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:27,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:27,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:27,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408004229] [2023-11-12 02:22:27,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:27,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:27,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:27,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:27,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:27,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 658 [2023-11-12 02:22:27,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:22:27,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:27,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 658 [2023-11-12 02:22:27,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:28,189 INFO L124 PetriNetUnfolderBase]: 1010/1494 cut-off events. [2023-11-12 02:22:28,189 INFO L125 PetriNetUnfolderBase]: For 3496/3496 co-relation queries the response was YES. [2023-11-12 02:22:28,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4415 conditions, 1494 events. 1010/1494 cut-off events. For 3496/3496 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5931 event pairs, 444 based on Foata normal form. 18/1191 useless extension candidates. Maximal degree in co-relation 4399. Up to 1130 conditions per place. [2023-11-12 02:22:28,203 INFO L140 encePairwiseOnDemand]: 653/658 looper letters, 85 selfloop transitions, 7 changer transitions 4/96 dead transitions. [2023-11-12 02:22:28,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 657 flow [2023-11-12 02:22:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1542 transitions. [2023-11-12 02:22:28,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46869300911854106 [2023-11-12 02:22:28,210 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1542 transitions. [2023-11-12 02:22:28,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1542 transitions. [2023-11-12 02:22:28,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:28,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1542 transitions. [2023-11-12 02:22:28,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states 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 02:22:28,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:28,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 658.0) internal successors, (3948), 6 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 02:22:28,224 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 375 flow. Second operand 5 states and 1542 transitions. [2023-11-12 02:22:28,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 657 flow [2023-11-12 02:22:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 643 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:28,236 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 344 flow [2023-11-12 02:22:28,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-11-12 02:22:28,238 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-11-12 02:22:28,238 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 344 flow [2023-11-12 02:22:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:22:28,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:28,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:22:28,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:28,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -262167249, now seen corresponding path program 4 times [2023-11-12 02:22:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379793004] [2023-11-12 02:22:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:28,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:28,386 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 02:22:28,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:28,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379793004] [2023-11-12 02:22:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379793004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:28,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:28,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:28,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091769729] [2023-11-12 02:22:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:28,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:28,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 658 [2023-11-12 02:22:28,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:28,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:28,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 658 [2023-11-12 02:22:28,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:28,725 INFO L124 PetriNetUnfolderBase]: 950/1388 cut-off events. [2023-11-12 02:22:28,726 INFO L125 PetriNetUnfolderBase]: For 3342/3342 co-relation queries the response was YES. [2023-11-12 02:22:28,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4061 conditions, 1388 events. 950/1388 cut-off events. For 3342/3342 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5376 event pairs, 218 based on Foata normal form. 16/1103 useless extension candidates. Maximal degree in co-relation 4044. Up to 1219 conditions per place. [2023-11-12 02:22:28,735 INFO L140 encePairwiseOnDemand]: 654/658 looper letters, 58 selfloop transitions, 10 changer transitions 3/71 dead transitions. [2023-11-12 02:22:28,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 526 flow [2023-11-12 02:22:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1233 transitions. [2023-11-12 02:22:28,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684650455927052 [2023-11-12 02:22:28,742 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1233 transitions. [2023-11-12 02:22:28,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1233 transitions. [2023-11-12 02:22:28,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:28,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1233 transitions. [2023-11-12 02:22:28,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.25) internal successors, (1233), 4 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 02:22:28,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:28,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:28,754 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 344 flow. Second operand 4 states and 1233 transitions. [2023-11-12 02:22:28,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 526 flow [2023-11-12 02:22:28,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 500 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-12 02:22:28,763 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 322 flow [2023-11-12 02:22:28,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=322, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-11-12 02:22:28,765 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-11-12 02:22:28,765 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 322 flow [2023-11-12 02:22:28,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 02:22:28,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:28,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:28,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:22:28,766 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2110664752, now seen corresponding path program 4 times [2023-11-12 02:22:28,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:28,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208765843] [2023-11-12 02:22:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:28,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:28,869 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 02:22:28,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208765843] [2023-11-12 02:22:28,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208765843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:28,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:28,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017005872] [2023-11-12 02:22:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:28,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:28,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 658 [2023-11-12 02:22:28,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 322 flow. Second operand has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:22:28,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:28,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 658 [2023-11-12 02:22:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:29,277 INFO L124 PetriNetUnfolderBase]: 936/1372 cut-off events. [2023-11-12 02:22:29,277 INFO L125 PetriNetUnfolderBase]: For 2345/2345 co-relation queries the response was YES. [2023-11-12 02:22:29,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 1372 events. 936/1372 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5353 event pairs, 209 based on Foata normal form. 14/1083 useless extension candidates. Maximal degree in co-relation 3895. Up to 1271 conditions per place. [2023-11-12 02:22:29,286 INFO L140 encePairwiseOnDemand]: 653/658 looper letters, 52 selfloop transitions, 6 changer transitions 11/69 dead transitions. [2023-11-12 02:22:29,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 496 flow [2023-11-12 02:22:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1222 transitions. [2023-11-12 02:22:29,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-12 02:22:29,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1222 transitions. [2023-11-12 02:22:29,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1222 transitions. [2023-11-12 02:22:29,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:29,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1222 transitions. [2023-11-12 02:22:29,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 305.5) internal successors, (1222), 4 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states 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 02:22:29,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:29,303 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:29,303 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 322 flow. Second operand 4 states and 1222 transitions. [2023-11-12 02:22:29,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 496 flow [2023-11-12 02:22:29,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 468 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:29,311 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 290 flow [2023-11-12 02:22:29,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2023-11-12 02:22:29,314 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-11-12 02:22:29,314 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 290 flow [2023-11-12 02:22:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 02:22:29,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:29,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:29,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:22:29,315 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:29,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1294813291, now seen corresponding path program 5 times [2023-11-12 02:22:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:29,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328221675] [2023-11-12 02:22:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:29,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:29,412 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 02:22:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328221675] [2023-11-12 02:22:29,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328221675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:29,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:29,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:29,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559118467] [2023-11-12 02:22:29,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:29,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 658 [2023-11-12 02:22:29,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:22:29,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:29,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 658 [2023-11-12 02:22:29,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:29,717 INFO L124 PetriNetUnfolderBase]: 883/1283 cut-off events. [2023-11-12 02:22:29,717 INFO L125 PetriNetUnfolderBase]: For 1713/1713 co-relation queries the response was YES. [2023-11-12 02:22:29,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3609 conditions, 1283 events. 883/1283 cut-off events. For 1713/1713 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4711 event pairs, 497 based on Foata normal form. 4/1004 useless extension candidates. Maximal degree in co-relation 3595. Up to 1269 conditions per place. [2023-11-12 02:22:29,726 INFO L140 encePairwiseOnDemand]: 655/658 looper letters, 47 selfloop transitions, 0 changer transitions 8/55 dead transitions. [2023-11-12 02:22:29,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 55 transitions, 395 flow [2023-11-12 02:22:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1211 transitions. [2023-11-12 02:22:29,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601063829787234 [2023-11-12 02:22:29,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1211 transitions. [2023-11-12 02:22:29,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1211 transitions. [2023-11-12 02:22:29,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:29,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1211 transitions. [2023-11-12 02:22:29,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 302.75) internal successors, (1211), 4 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states 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 02:22:29,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:29,744 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:29,745 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 290 flow. Second operand 4 states and 1211 transitions. [2023-11-12 02:22:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 55 transitions, 395 flow [2023-11-12 02:22:29,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 377 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-12 02:22:29,748 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 235 flow [2023-11-12 02:22:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2023-11-12 02:22:29,749 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-11-12 02:22:29,749 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 235 flow [2023-11-12 02:22:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:22:29,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:29,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:29,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:22:29,751 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:29,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1544470204, now seen corresponding path program 5 times [2023-11-12 02:22:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:29,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387882423] [2023-11-12 02:22:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:29,833 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 02:22:29,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387882423] [2023-11-12 02:22:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387882423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:29,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:29,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:29,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069471636] [2023-11-12 02:22:29,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:29,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:29,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:29,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 658 [2023-11-12 02:22:29,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:22:29,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:29,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 658 [2023-11-12 02:22:29,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:30,144 INFO L124 PetriNetUnfolderBase]: 803/1151 cut-off events. [2023-11-12 02:22:30,144 INFO L125 PetriNetUnfolderBase]: For 905/905 co-relation queries the response was YES. [2023-11-12 02:22:30,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 1151 events. 803/1151 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3972 event pairs, 444 based on Foata normal form. 10/906 useless extension candidates. Maximal degree in co-relation 3204. Up to 1130 conditions per place. [2023-11-12 02:22:30,152 INFO L140 encePairwiseOnDemand]: 655/658 looper letters, 44 selfloop transitions, 0 changer transitions 10/54 dead transitions. [2023-11-12 02:22:30,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 344 flow [2023-11-12 02:22:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1212 transitions. [2023-11-12 02:22:30,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048632218844987 [2023-11-12 02:22:30,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1212 transitions. [2023-11-12 02:22:30,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1212 transitions. [2023-11-12 02:22:30,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:30,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1212 transitions. [2023-11-12 02:22:30,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 02:22:30,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:30,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 658.0) internal successors, (3290), 5 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 02:22:30,176 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 235 flow. Second operand 4 states and 1212 transitions. [2023-11-12 02:22:30,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 344 flow [2023-11-12 02:22:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 341 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:30,180 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 199 flow [2023-11-12 02:22:30,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-11-12 02:22:30,181 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-11-12 02:22:30,181 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 199 flow [2023-11-12 02:22:30,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states 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 02:22:30,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:30,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:22:30,183 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:30,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -475569719, now seen corresponding path program 1 times [2023-11-12 02:22:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:30,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870439748] [2023-11-12 02:22:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:31,047 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 02:22:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:31,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870439748] [2023-11-12 02:22:31,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870439748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:31,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:31,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980972020] [2023-11-12 02:22:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:31,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:22:31,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:22:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:22:32,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 658 [2023-11-12 02:22:32,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 265.2) internal successors, (2652), 10 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 02:22:32,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:32,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 658 [2023-11-12 02:22:32,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:33,042 INFO L124 PetriNetUnfolderBase]: 1680/2439 cut-off events. [2023-11-12 02:22:33,042 INFO L125 PetriNetUnfolderBase]: For 1748/1748 co-relation queries the response was YES. [2023-11-12 02:22:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6769 conditions, 2439 events. 1680/2439 cut-off events. For 1748/1748 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10302 event pairs, 368 based on Foata normal form. 1/1910 useless extension candidates. Maximal degree in co-relation 6759. Up to 693 conditions per place. [2023-11-12 02:22:33,059 INFO L140 encePairwiseOnDemand]: 644/658 looper letters, 143 selfloop transitions, 24 changer transitions 26/193 dead transitions. [2023-11-12 02:22:33,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 193 transitions, 1172 flow [2023-11-12 02:22:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:22:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:22:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3579 transitions. [2023-11-12 02:22:33,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41840074818798223 [2023-11-12 02:22:33,073 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3579 transitions. [2023-11-12 02:22:33,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3579 transitions. [2023-11-12 02:22:33,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:33,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3579 transitions. [2023-11-12 02:22:33,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 275.3076923076923) internal successors, (3579), 13 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:33,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 658.0) internal successors, (9212), 14 states have internal predecessors, (9212), 0 states have call successors, (0), 0 states 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 02:22:33,105 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 658.0) internal successors, (9212), 14 states have internal predecessors, (9212), 0 states have call successors, (0), 0 states 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 02:22:33,105 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 199 flow. Second operand 13 states and 3579 transitions. [2023-11-12 02:22:33,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 193 transitions, 1172 flow [2023-11-12 02:22:33,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 193 transitions, 1162 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:33,111 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 430 flow [2023-11-12 02:22:33,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=430, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-11-12 02:22:33,112 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2023-11-12 02:22:33,112 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 430 flow [2023-11-12 02:22:33,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 265.2) internal successors, (2652), 10 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 02:22:33,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:33,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:33,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:22:33,114 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:33,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2083912667, now seen corresponding path program 2 times [2023-11-12 02:22:33,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:33,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302607772] [2023-11-12 02:22:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:33,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:33,962 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 02:22:33,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:33,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302607772] [2023-11-12 02:22:33,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302607772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:33,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:33,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:22:33,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097858972] [2023-11-12 02:22:33,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:33,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:33,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:34,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 658 [2023-11-12 02:22:34,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 430 flow. Second operand has 9 states, 9 states have (on average 271.44444444444446) internal successors, (2443), 9 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states 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 02:22:34,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:34,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 658 [2023-11-12 02:22:34,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:35,364 INFO L124 PetriNetUnfolderBase]: 1568/2301 cut-off events. [2023-11-12 02:22:35,365 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2023-11-12 02:22:35,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 2301 events. 1568/2301 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9677 event pairs, 585 based on Foata normal form. 71/2105 useless extension candidates. Maximal degree in co-relation 7606. Up to 731 conditions per place. [2023-11-12 02:22:35,382 INFO L140 encePairwiseOnDemand]: 645/658 looper letters, 104 selfloop transitions, 20 changer transitions 9/133 dead transitions. [2023-11-12 02:22:35,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 133 transitions, 1016 flow [2023-11-12 02:22:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:22:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2252 transitions. [2023-11-12 02:22:35,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278115501519757 [2023-11-12 02:22:35,393 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2252 transitions. [2023-11-12 02:22:35,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2252 transitions. [2023-11-12 02:22:35,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:35,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2252 transitions. [2023-11-12 02:22:35,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 281.5) internal successors, (2252), 8 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 02:22:35,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 658.0) internal successors, (5922), 9 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states 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 02:22:35,411 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 658.0) internal successors, (5922), 9 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states 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 02:22:35,411 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 430 flow. Second operand 8 states and 2252 transitions. [2023-11-12 02:22:35,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 133 transitions, 1016 flow [2023-11-12 02:22:35,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 1000 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:35,426 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 537 flow [2023-11-12 02:22:35,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=658, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=537, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-11-12 02:22:35,427 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2023-11-12 02:22:35,427 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 537 flow [2023-11-12 02:22:35,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 271.44444444444446) internal successors, (2443), 9 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states 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 02:22:35,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:35,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 02:22:35,429 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:35,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1405737802, now seen corresponding path program 1 times [2023-11-12 02:22:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535152146] [2023-11-12 02:22:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:36,077 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 02:22:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:36,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535152146] [2023-11-12 02:22:36,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535152146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426314348] [2023-11-12 02:22:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:36,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:36,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:36,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:36,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02bde1a8-f44f-48e3-91fb-7d85303e1661/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:36,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:22:36,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:36,834 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 02:22:36,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:37,140 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:37,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-12 02:22:39,570 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 02:22:39,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426314348] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:39,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:39,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2023-11-12 02:22:39,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545567942] [2023-11-12 02:22:39,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:39,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:22:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:22:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:22:41,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 658 [2023-11-12 02:22:41,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 256.3) internal successors, (2563), 10 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states 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 02:22:41,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:41,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 658 [2023-11-12 02:22:41,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand