./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/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_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/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_95181bfc-54ac-4eea-a6bf-8fccbb196da2/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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:16:59,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:16:59,861 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:16:59,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:16:59,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:16:59,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:16:59,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:16:59,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:16:59,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:16:59,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:16:59,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:16:59,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:16:59,894 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:16:59,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:16:59,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:16:59,896 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:16:59,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:16:59,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:16:59,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:16:59,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:16:59,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:16:59,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:16:59,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:16:59,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:16:59,901 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:16:59,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:16:59,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:16:59,902 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:16:59,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:16:59,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:16:59,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:16:59,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:16:59,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:16:59,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:16:59,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:16:59,906 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:16:59,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:16:59,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:16:59,907 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:16:59,908 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_95181bfc-54ac-4eea-a6bf-8fccbb196da2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-12 02:17:00,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:00,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:00,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:00,259 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:00,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:00,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-12 02:17:03,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:03,580 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:03,580 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-12 02:17:03,592 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/data/13720723c/c194171217fe4987a9d1d64aaed67703/FLAGd1eba3d0a [2023-11-12 02:17:03,613 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/data/13720723c/c194171217fe4987a9d1d64aaed67703 [2023-11-12 02:17:03,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:03,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:03,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:03,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:03,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:03,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:03,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d523b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03, skipping insertion in model container [2023-11-12 02:17:03,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:03,668 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:03,881 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_95181bfc-54ac-4eea-a6bf-8fccbb196da2/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-12 02:17:03,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:03,901 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:03,928 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_95181bfc-54ac-4eea-a6bf-8fccbb196da2/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-12 02:17:03,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:03,950 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:17:03,950 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:17:03,958 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:17:03,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03 WrapperNode [2023-11-12 02:17:03,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:03,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:03,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:17:03,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:17:03,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:03,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,005 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2023-11-12 02:17:04,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:04,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:17:04,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:17:04,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:17:04,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:17:04,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:17:04,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:17:04,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:17:04,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (1/1) ... [2023-11-12 02:17:04,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:04,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:17:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:17:04,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:17:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:17:04,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:17:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:17:04,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:17:04,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:17:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:17:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:17:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:17:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:17:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:17:04,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:17:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:17:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:17:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:17:04,127 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 02:17:04,255 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:17:04,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:17:04,541 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:17:04,660 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:17:04,660 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:17:04,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:04 BoogieIcfgContainer [2023-11-12 02:17:04,663 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:17:04,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:17:04,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:17:04,670 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:17:04,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:03" (1/3) ... [2023-11-12 02:17:04,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf25578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:04, skipping insertion in model container [2023-11-12 02:17:04,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:03" (2/3) ... [2023-11-12 02:17:04,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf25578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:04, skipping insertion in model container [2023-11-12 02:17:04,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:04" (3/3) ... [2023-11-12 02:17:04,673 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-12 02:17:04,683 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:17:04,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:17:04,695 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:17:04,695 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:17:04,798 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:17:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 252 flow [2023-11-12 02:17:04,943 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-11-12 02:17:04,944 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:04,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-12 02:17:04,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 252 flow [2023-11-12 02:17:04,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2023-11-12 02:17:04,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:17:04,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 108 transitions, 228 flow [2023-11-12 02:17:04,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 108 transitions, 228 flow [2023-11-12 02:17:04,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 228 flow [2023-11-12 02:17:05,023 INFO L124 PetriNetUnfolderBase]: 9/108 cut-off events. [2023-11-12 02:17:05,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:05,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-12 02:17:05,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-11-12 02:17:09,342 INFO L134 LiptonReduction]: Checked pairs total: 578 [2023-11-12 02:17:09,343 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-12 02:17:09,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:17:09,367 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;@3a53c0c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:17:09,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:17:09,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:17:09,377 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-12 02:17:09,377 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:09,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:09,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:09,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:09,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1378278166, now seen corresponding path program 1 times [2023-11-12 02:17:09,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:09,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914427518] [2023-11-12 02:17:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:09,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:09,754 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 02:17:09,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:09,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914427518] [2023-11-12 02:17:09,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914427518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:09,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:09,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:17:09,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304865927] [2023-11-12 02:17:09,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:09,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:09,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:09,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 231 [2023-11-12 02:17:09,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 02:17:09,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:09,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 231 [2023-11-12 02:17:09,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:09,938 INFO L124 PetriNetUnfolderBase]: 60/106 cut-off events. [2023-11-12 02:17:09,938 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-12 02:17:09,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 106 events. 60/106 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 268 event pairs, 14 based on Foata normal form. 1/71 useless extension candidates. Maximal degree in co-relation 168. Up to 53 conditions per place. [2023-11-12 02:17:09,945 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 19 selfloop transitions, 2 changer transitions 2/25 dead transitions. [2023-11-12 02:17:09,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 25 transitions, 114 flow [2023-11-12 02:17:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-11-12 02:17:09,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-11-12 02:17:09,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-11-12 02:17:09,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-11-12 02:17:09,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:09,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-11-12 02:17:09,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 02:17:09,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 02:17:09,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 02:17:09,996 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 336 transitions. [2023-11-12 02:17:09,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 25 transitions, 114 flow [2023-11-12 02:17:10,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:17:10,002 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-12 02:17:10,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-12 02:17:10,008 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-12 02:17:10,009 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-12 02:17:10,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 02:17:10,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:17:10,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:10,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1261719986, now seen corresponding path program 1 times [2023-11-12 02:17:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:10,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624830012] [2023-11-12 02:17:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:10,174 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 02:17:10,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624830012] [2023-11-12 02:17:10,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624830012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:10,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:10,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411499388] [2023-11-12 02:17:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:10,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:10,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:10,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-12 02:17:10,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 02:17:10,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:10,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-12 02:17:10,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:10,247 INFO L124 PetriNetUnfolderBase]: 52/105 cut-off events. [2023-11-12 02:17:10,247 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:17:10,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 105 events. 52/105 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 308 event pairs, 17 based on Foata normal form. 6/94 useless extension candidates. Maximal degree in co-relation 138. Up to 74 conditions per place. [2023-11-12 02:17:10,249 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 18 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-11-12 02:17:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 121 flow [2023-11-12 02:17:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-12 02:17:10,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906204906204906 [2023-11-12 02:17:10,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-12 02:17:10,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-12 02:17:10,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:10,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-12 02:17:10,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 02:17:10,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 02:17:10,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 02:17:10,259 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 340 transitions. [2023-11-12 02:17:10,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 121 flow [2023-11-12 02:17:10,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:10,261 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 60 flow [2023-11-12 02:17:10,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-11-12 02:17:10,263 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-12 02:17:10,263 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 60 flow [2023-11-12 02:17:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 02:17:10,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:10,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:10,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:17:10,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:10,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash -501695879, now seen corresponding path program 1 times [2023-11-12 02:17:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:10,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521012954] [2023-11-12 02:17:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:10,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521012954] [2023-11-12 02:17:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521012954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:10,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002304290] [2023-11-12 02:17:10,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:10,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 231 [2023-11-12 02:17:10,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 02:17:10,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:10,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 231 [2023-11-12 02:17:10,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:10,752 INFO L124 PetriNetUnfolderBase]: 61/138 cut-off events. [2023-11-12 02:17:10,752 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-12 02:17:10,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 138 events. 61/138 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 500 event pairs, 44 based on Foata normal form. 6/142 useless extension candidates. Maximal degree in co-relation 220. Up to 103 conditions per place. [2023-11-12 02:17:10,753 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 16 selfloop transitions, 2 changer transitions 10/30 dead transitions. [2023-11-12 02:17:10,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 30 transitions, 142 flow [2023-11-12 02:17:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-11-12 02:17:10,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45346320346320346 [2023-11-12 02:17:10,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-11-12 02:17:10,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-11-12 02:17:10,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:10,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-11-12 02:17:10,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 02:17:10,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 02:17:10,765 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 02:17:10,765 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 60 flow. Second operand 4 states and 419 transitions. [2023-11-12 02:17:10,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 30 transitions, 142 flow [2023-11-12 02:17:10,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:10,768 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 72 flow [2023-11-12 02:17:10,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-12 02:17:10,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-12 02:17:10,774 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 72 flow [2023-11-12 02:17:10,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 02:17:10,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:10,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:17:10,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:10,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash -746487760, now seen corresponding path program 1 times [2023-11-12 02:17:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265271082] [2023-11-12 02:17:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265271082] [2023-11-12 02:17:11,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265271082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530556295] [2023-11-12 02:17:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:11,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:11,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:11,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:11,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:17:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:11,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:17:11,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:11,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-12 02:17:11,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:17:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:11,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:11,705 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_57 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_57) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2023-11-12 02:17:11,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:11,731 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 45 treesize of output 34 [2023-11-12 02:17:11,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-12 02:17:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:11,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530556295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:11,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:11,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 02:17:11,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102847052] [2023-11-12 02:17:11,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:11,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:17:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:17:11,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-11-12 02:17:11,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 231 [2023-11-12 02:17:11,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 72 flow. Second operand has 11 states, 11 states have (on average 85.18181818181819) internal successors, (937), 11 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 02:17:11,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:11,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 231 [2023-11-12 02:17:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:12,115 INFO L124 PetriNetUnfolderBase]: 68/135 cut-off events. [2023-11-12 02:17:12,115 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-12 02:17:12,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 135 events. 68/135 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 403 event pairs, 9 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 321. Up to 37 conditions per place. [2023-11-12 02:17:12,118 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 27 selfloop transitions, 5 changer transitions 9/43 dead transitions. [2023-11-12 02:17:12,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 213 flow [2023-11-12 02:17:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:17:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:17:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 539 transitions. [2023-11-12 02:17:12,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-11-12 02:17:12,121 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 539 transitions. [2023-11-12 02:17:12,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 539 transitions. [2023-11-12 02:17:12,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:12,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 539 transitions. [2023-11-12 02:17:12,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 02:17:12,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states 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 02:17:12,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 231.0) internal successors, (1617), 7 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states 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 02:17:12,130 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 72 flow. Second operand 6 states and 539 transitions. [2023-11-12 02:17:12,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 213 flow [2023-11-12 02:17:12,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 207 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:12,138 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 86 flow [2023-11-12 02:17:12,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-12 02:17:12,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-11-12 02:17:12,140 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 86 flow [2023-11-12 02:17:12,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 85.18181818181819) internal successors, (937), 11 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 02:17:12,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:12,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:12,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:12,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:12,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:12,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2015139898, now seen corresponding path program 2 times [2023-11-12 02:17:12,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980578589] [2023-11-12 02:17:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980578589] [2023-11-12 02:17:12,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980578589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432723949] [2023-11-12 02:17:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:12,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:12,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:17:12,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:12,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:17:12,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:12,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432723949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:12,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-12 02:17:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013804275] [2023-11-12 02:17:12,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:12,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:17:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:12,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:17:12,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:12,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2023-11-12 02:17:12,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 02:17:12,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:12,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2023-11-12 02:17:12,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:12,810 INFO L124 PetriNetUnfolderBase]: 140/278 cut-off events. [2023-11-12 02:17:12,810 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2023-11-12 02:17:12,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 278 events. 140/278 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1111 event pairs, 41 based on Foata normal form. 12/290 useless extension candidates. Maximal degree in co-relation 702. Up to 111 conditions per place. [2023-11-12 02:17:12,816 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 35 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-12 02:17:12,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 250 flow [2023-11-12 02:17:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-11-12 02:17:12,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945887445887446 [2023-11-12 02:17:12,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-11-12 02:17:12,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-11-12 02:17:12,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:12,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-11-12 02:17:12,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 02:17:12,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 02:17:12,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states 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 02:17:12,828 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 86 flow. Second operand 4 states and 457 transitions. [2023-11-12 02:17:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 250 flow [2023-11-12 02:17:12,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 236 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-12 02:17:12,835 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 140 flow [2023-11-12 02:17:12,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-12 02:17:12,838 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-12 02:17:12,841 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 140 flow [2023-11-12 02:17:12,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 02:17:12,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:12,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:12,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:17:13,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:13,048 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:13,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 645020739, now seen corresponding path program 3 times [2023-11-12 02:17:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:13,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042509097] [2023-11-12 02:17:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:13,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:13,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:13,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042509097] [2023-11-12 02:17:13,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042509097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:13,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764697486] [2023-11-12 02:17:13,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:17:13,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:13,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:13,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:17:13,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:17:13,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:13,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 02:17:13,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:13,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:17:13,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:17:13,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:17:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:13,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:14,264 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:14,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-11-12 02:17:14,290 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-12 02:17:14,290 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 324 treesize of output 291 [2023-11-12 02:17:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:17:14,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-11-12 02:17:14,337 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-12 02:17:14,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 67 [2023-11-12 02:17:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764697486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:14,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-11-12 02:17:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157286154] [2023-11-12 02:17:14,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:17:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:17:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2023-11-12 02:17:15,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 231 [2023-11-12 02:17:15,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 140 flow. Second operand has 17 states, 17 states have (on average 69.6470588235294) internal successors, (1184), 17 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 02:17:15,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:15,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 231 [2023-11-12 02:17:15,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:17,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:19,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:20,193 INFO L124 PetriNetUnfolderBase]: 194/416 cut-off events. [2023-11-12 02:17:20,193 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2023-11-12 02:17:20,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 416 events. 194/416 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1981 event pairs, 70 based on Foata normal form. 19/433 useless extension candidates. Maximal degree in co-relation 816. Up to 178 conditions per place. [2023-11-12 02:17:20,196 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 26 selfloop transitions, 5 changer transitions 42/75 dead transitions. [2023-11-12 02:17:20,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 75 transitions, 441 flow [2023-11-12 02:17:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:17:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:17:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 739 transitions. [2023-11-12 02:17:20,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3199134199134199 [2023-11-12 02:17:20,201 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 739 transitions. [2023-11-12 02:17:20,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 739 transitions. [2023-11-12 02:17:20,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:20,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 739 transitions. [2023-11-12 02:17:20,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 02:17:20,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states 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 02:17:20,210 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 231.0) internal successors, (2541), 11 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states 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 02:17:20,210 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 140 flow. Second operand 10 states and 739 transitions. [2023-11-12 02:17:20,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 75 transitions, 441 flow [2023-11-12 02:17:20,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 431 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-12 02:17:20,214 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 168 flow [2023-11-12 02:17:20,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-11-12 02:17:20,215 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-12 02:17:20,215 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 168 flow [2023-11-12 02:17:20,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.6470588235294) internal successors, (1184), 17 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 02:17:20,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:20,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:20,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:20,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:20,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1642046884, now seen corresponding path program 4 times [2023-11-12 02:17:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464484924] [2023-11-12 02:17:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:21,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464484924] [2023-11-12 02:17:21,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464484924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:21,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578113429] [2023-11-12 02:17:21,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:17:21,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:21,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:21,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:17:21,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:17:21,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:21,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:17:21,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:21,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:21,486 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:17:21,486 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 28 treesize of output 11 [2023-11-12 02:17:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:21,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578113429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:21,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:21,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 15 [2023-11-12 02:17:21,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686370806] [2023-11-12 02:17:21,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:17:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:17:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:17:21,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 231 [2023-11-12 02:17:21,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 168 flow. Second operand has 17 states, 17 states have (on average 93.6470588235294) internal successors, (1592), 17 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 02:17:21,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:21,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 231 [2023-11-12 02:17:21,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:22,738 INFO L124 PetriNetUnfolderBase]: 332/635 cut-off events. [2023-11-12 02:17:22,739 INFO L125 PetriNetUnfolderBase]: For 949/949 co-relation queries the response was YES. [2023-11-12 02:17:22,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 635 events. 332/635 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3139 event pairs, 21 based on Foata normal form. 5/639 useless extension candidates. Maximal degree in co-relation 1956. Up to 126 conditions per place. [2023-11-12 02:17:22,744 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 67 selfloop transitions, 27 changer transitions 51/147 dead transitions. [2023-11-12 02:17:22,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 147 transitions, 884 flow [2023-11-12 02:17:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:17:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:17:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1874 transitions. [2023-11-12 02:17:22,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269765322396901 [2023-11-12 02:17:22,751 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1874 transitions. [2023-11-12 02:17:22,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1874 transitions. [2023-11-12 02:17:22,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:22,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1874 transitions. [2023-11-12 02:17:22,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.63157894736842) internal successors, (1874), 19 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states 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 02:17:22,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 231.0) internal successors, (4620), 20 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states 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 02:17:22,768 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 231.0) internal successors, (4620), 20 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states 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 02:17:22,768 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 168 flow. Second operand 19 states and 1874 transitions. [2023-11-12 02:17:22,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 147 transitions, 884 flow [2023-11-12 02:17:22,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 147 transitions, 848 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-12 02:17:22,774 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 377 flow [2023-11-12 02:17:22,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=377, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-12 02:17:22,775 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-11-12 02:17:22,775 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 377 flow [2023-11-12 02:17:22,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 93.6470588235294) internal successors, (1592), 17 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 02:17:22,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:22,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:22,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:22,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:22,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:22,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash -56468956, now seen corresponding path program 5 times [2023-11-12 02:17:22,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:22,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401606892] [2023-11-12 02:17:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:22,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:23,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:23,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401606892] [2023-11-12 02:17:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401606892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:23,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193022426] [2023-11-12 02:17:23,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:17:23,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:23,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:23,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:23,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:17:23,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:23,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:23,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:17:23,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:23,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-11-12 02:17:24,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:17:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:24,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:24,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:24,386 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 47 treesize of output 35 [2023-11-12 02:17:24,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-12 02:17:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193022426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:24,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-12 02:17:24,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516143892] [2023-11-12 02:17:24,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:24,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:17:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:17:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:17:25,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 231 [2023-11-12 02:17:25,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 377 flow. Second operand has 22 states, 22 states have (on average 86.0909090909091) internal successors, (1894), 22 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states 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 02:17:25,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:25,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 231 [2023-11-12 02:17:25,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:26,019 INFO L124 PetriNetUnfolderBase]: 348/664 cut-off events. [2023-11-12 02:17:26,019 INFO L125 PetriNetUnfolderBase]: For 1245/1245 co-relation queries the response was YES. [2023-11-12 02:17:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 664 events. 348/664 cut-off events. For 1245/1245 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3280 event pairs, 27 based on Foata normal form. 1/665 useless extension candidates. Maximal degree in co-relation 2181. Up to 132 conditions per place. [2023-11-12 02:17:26,024 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 54 selfloop transitions, 29 changer transitions 42/127 dead transitions. [2023-11-12 02:17:26,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 872 flow [2023-11-12 02:17:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:17:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:17:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1458 transitions. [2023-11-12 02:17:26,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944805194805195 [2023-11-12 02:17:26,032 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1458 transitions. [2023-11-12 02:17:26,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1458 transitions. [2023-11-12 02:17:26,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:26,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1458 transitions. [2023-11-12 02:17:26,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 91.125) internal successors, (1458), 16 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 02:17:26,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states 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 02:17:26,048 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states 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 02:17:26,048 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 377 flow. Second operand 16 states and 1458 transitions. [2023-11-12 02:17:26,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 872 flow [2023-11-12 02:17:26,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 127 transitions, 742 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-11-12 02:17:26,060 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 350 flow [2023-11-12 02:17:26,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=350, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-11-12 02:17:26,062 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2023-11-12 02:17:26,062 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 350 flow [2023-11-12 02:17:26,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 86.0909090909091) internal successors, (1894), 22 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states 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 02:17:26,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:26,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:26,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:17:26,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:26,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 835940828, now seen corresponding path program 6 times [2023-11-12 02:17:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:26,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428781562] [2023-11-12 02:17:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:26,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428781562] [2023-11-12 02:17:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428781562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292330748] [2023-11-12 02:17:26,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:17:26,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:26,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:26,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:26,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:17:26,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:17:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:26,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:17:26,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:26,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292330748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:26,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-11-12 02:17:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950296989] [2023-11-12 02:17:26,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:26,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:17:26,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:17:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:17:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 231 [2023-11-12 02:17:27,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 96.66666666666667) internal successors, (1740), 18 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 02:17:27,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:27,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 231 [2023-11-12 02:17:27,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:27,906 INFO L124 PetriNetUnfolderBase]: 971/1871 cut-off events. [2023-11-12 02:17:27,906 INFO L125 PetriNetUnfolderBase]: For 3228/3228 co-relation queries the response was YES. [2023-11-12 02:17:27,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 1871 events. 971/1871 cut-off events. For 3228/3228 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11843 event pairs, 179 based on Foata normal form. 52/1923 useless extension candidates. Maximal degree in co-relation 5025. Up to 451 conditions per place. [2023-11-12 02:17:27,916 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 53 selfloop transitions, 41 changer transitions 65/161 dead transitions. [2023-11-12 02:17:27,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 161 transitions, 1314 flow [2023-11-12 02:17:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:17:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:17:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1421 transitions. [2023-11-12 02:17:27,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-11-12 02:17:27,924 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1421 transitions. [2023-11-12 02:17:27,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1421 transitions. [2023-11-12 02:17:27,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:27,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1421 transitions. [2023-11-12 02:17:27,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 101.5) internal successors, (1421), 14 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states 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 02:17:27,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 02:17:27,938 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 02:17:27,938 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 350 flow. Second operand 14 states and 1421 transitions. [2023-11-12 02:17:27,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 161 transitions, 1314 flow [2023-11-12 02:17:27,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 161 transitions, 1203 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-12 02:17:27,959 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 641 flow [2023-11-12 02:17:27,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=641, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-11-12 02:17:27,961 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2023-11-12 02:17:27,961 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 641 flow [2023-11-12 02:17:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.66666666666667) internal successors, (1740), 18 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 02:17:27,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:27,962 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:27,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:28,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:28,169 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:28,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1869661826, now seen corresponding path program 7 times [2023-11-12 02:17:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554287069] [2023-11-12 02:17:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:28,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554287069] [2023-11-12 02:17:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554287069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321865452] [2023-11-12 02:17:28,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:17:28,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:28,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:28,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:28,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:17:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:29,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:17:29,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:29,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:29,514 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:17:29,514 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 27 treesize of output 11 [2023-11-12 02:17:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321865452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:29,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:29,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 23 [2023-11-12 02:17:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938344372] [2023-11-12 02:17:29,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:29,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:17:29,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:17:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:17:30,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 231 [2023-11-12 02:17:30,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 641 flow. Second operand has 25 states, 25 states have (on average 92.92) internal successors, (2323), 25 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states 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 02:17:30,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:30,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 231 [2023-11-12 02:17:30,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:32,255 INFO L124 PetriNetUnfolderBase]: 1204/2267 cut-off events. [2023-11-12 02:17:32,256 INFO L125 PetriNetUnfolderBase]: For 4662/4662 co-relation queries the response was YES. [2023-11-12 02:17:32,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7639 conditions, 2267 events. 1204/2267 cut-off events. For 4662/4662 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14004 event pairs, 73 based on Foata normal form. 12/2279 useless extension candidates. Maximal degree in co-relation 7590. Up to 468 conditions per place. [2023-11-12 02:17:32,272 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 164 selfloop transitions, 105 changer transitions 122/393 dead transitions. [2023-11-12 02:17:32,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 393 transitions, 2779 flow [2023-11-12 02:17:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-12 02:17:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-12 02:17:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4645 transitions. [2023-11-12 02:17:32,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427834576770747 [2023-11-12 02:17:32,290 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4645 transitions. [2023-11-12 02:17:32,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4645 transitions. [2023-11-12 02:17:32,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:32,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4645 transitions. [2023-11-12 02:17:32,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 98.82978723404256) internal successors, (4645), 47 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states 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 02:17:32,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 231.0) internal successors, (11088), 48 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states 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 02:17:32,341 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 231.0) internal successors, (11088), 48 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states 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 02:17:32,350 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 641 flow. Second operand 47 states and 4645 transitions. [2023-11-12 02:17:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 393 transitions, 2779 flow [2023-11-12 02:17:32,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 393 transitions, 2677 flow, removed 49 selfloop flow, removed 4 redundant places. [2023-11-12 02:17:32,397 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 1407 flow [2023-11-12 02:17:32,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1407, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2023-11-12 02:17:32,399 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-11-12 02:17:32,399 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 1407 flow [2023-11-12 02:17:32,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 92.92) internal successors, (2323), 25 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states 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 02:17:32,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:32,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:32,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:32,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:17:32,613 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:32,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash -48397002, now seen corresponding path program 8 times [2023-11-12 02:17:32,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:32,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549122207] [2023-11-12 02:17:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:32,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:33,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549122207] [2023-11-12 02:17:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549122207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418308990] [2023-11-12 02:17:33,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:33,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:33,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:33,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:17:33,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:33,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:33,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:17:33,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:33,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:33,741 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:17:33,742 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 28 treesize of output 11 [2023-11-12 02:17:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418308990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:33,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:33,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 23 [2023-11-12 02:17:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802087732] [2023-11-12 02:17:33,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:33,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:17:33,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:17:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:17:34,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 231 [2023-11-12 02:17:34,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 1407 flow. Second operand has 25 states, 25 states have (on average 93.12) internal successors, (2328), 25 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 02:17:34,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:34,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 231 [2023-11-12 02:17:34,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:37,210 INFO L124 PetriNetUnfolderBase]: 1622/3017 cut-off events. [2023-11-12 02:17:37,210 INFO L125 PetriNetUnfolderBase]: For 11313/11313 co-relation queries the response was YES. [2023-11-12 02:17:37,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10612 conditions, 3017 events. 1622/3017 cut-off events. For 11313/11313 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19698 event pairs, 81 based on Foata normal form. 19/3036 useless extension candidates. Maximal degree in co-relation 10551. Up to 624 conditions per place. [2023-11-12 02:17:37,231 INFO L140 encePairwiseOnDemand]: 224/231 looper letters, 137 selfloop transitions, 146 changer transitions 128/413 dead transitions. [2023-11-12 02:17:37,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 413 transitions, 3318 flow [2023-11-12 02:17:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-12 02:17:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-12 02:17:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4248 transitions. [2023-11-12 02:17:37,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42766535789791604 [2023-11-12 02:17:37,242 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4248 transitions. [2023-11-12 02:17:37,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4248 transitions. [2023-11-12 02:17:37,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:37,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4248 transitions. [2023-11-12 02:17:37,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 98.79069767441861) internal successors, (4248), 43 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states 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 02:17:37,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 231.0) internal successors, (10164), 44 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states 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 02:17:37,275 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 231.0) internal successors, (10164), 44 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states 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 02:17:37,275 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 1407 flow. Second operand 43 states and 4248 transitions. [2023-11-12 02:17:37,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 413 transitions, 3318 flow [2023-11-12 02:17:37,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 413 transitions, 2864 flow, removed 83 selfloop flow, removed 17 redundant places. [2023-11-12 02:17:37,336 INFO L231 Difference]: Finished difference. Result has 160 places, 163 transitions, 1903 flow [2023-11-12 02:17:37,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1903, PETRI_PLACES=160, PETRI_TRANSITIONS=163} [2023-11-12 02:17:37,337 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2023-11-12 02:17:37,337 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 163 transitions, 1903 flow [2023-11-12 02:17:37,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.12) internal successors, (2328), 25 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 02:17:37,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:37,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:37,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:37,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:17:37,545 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:37,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1082637648, now seen corresponding path program 9 times [2023-11-12 02:17:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:37,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89364331] [2023-11-12 02:17:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:38,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89364331] [2023-11-12 02:17:38,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89364331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:38,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672702897] [2023-11-12 02:17:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:17:38,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:38,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:38,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95181bfc-54ac-4eea-a6bf-8fccbb196da2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:17:38,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:17:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:38,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:17:38,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:38,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-12 02:17:38,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:17:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:17:39,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-12 02:17:39,632 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-12 02:17:39,632 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 26 treesize of output 10 [2023-11-12 02:17:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:39,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:40,678 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:40,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-12 02:17:40,699 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:40,700 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 184 treesize of output 167 [2023-11-12 02:17:40,728 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:40,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2023-11-12 02:17:40,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-12 02:17:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672702897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:41,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-12 02:17:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82630406] [2023-11-12 02:17:41,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:17:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:17:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:17:44,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:17:45,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 231 [2023-11-12 02:17:45,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 163 transitions, 1903 flow. Second operand has 32 states, 32 states have (on average 77.71875) internal successors, (2487), 32 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states 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 02:17:45,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:45,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 231 [2023-11-12 02:17:45,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:50,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]