./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i --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_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/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_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/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_e89587f9-226e-47bd-9e3c-497309b97218/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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:23:57,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:23:57,090 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:23:57,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:23:57,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:23:57,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:23:57,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:23:57,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:23:57,127 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:23:57,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:23:57,129 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:23:57,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:23:57,130 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:23:57,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:23:57,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:23:57,132 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:23:57,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:23:57,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:23:57,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:23:57,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:23:57,136 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:23:57,137 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:23:57,137 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:23:57,138 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:23:57,138 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:23:57,139 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:23:57,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:23:57,140 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:23:57,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:23:57,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:23:57,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:23:57,142 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:23:57,143 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:23:57,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:23:57,144 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:23:57,144 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:23:57,168 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:23:57,169 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:23:57,169 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:23:57,170 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_e89587f9-226e-47bd-9e3c-497309b97218/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2023-11-12 02:23:57,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:23:57,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:23:57,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:23:57,507 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:23:57,507 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:23:57,509 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2023-11-12 02:24:00,696 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:24:01,092 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:24:01,094 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2023-11-12 02:24:01,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/data/7dd938719/4eec30110ead4d3db0b0421b891b83d4/FLAGe331a18ff [2023-11-12 02:24:01,141 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/data/7dd938719/4eec30110ead4d3db0b0421b891b83d4 [2023-11-12 02:24:01,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:24:01,147 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:24:01,157 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:24:01,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:24:01,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:24:01,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e43d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01, skipping insertion in model container [2023-11-12 02:24:01,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:24:01,681 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_e89587f9-226e-47bd-9e3c-497309b97218/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-11-12 02:24:01,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:24:01,737 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:24:01,779 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_e89587f9-226e-47bd-9e3c-497309b97218/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-11-12 02:24:01,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:24:01,874 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:24:01,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01 WrapperNode [2023-11-12 02:24:01,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:24:01,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:24:01,877 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:24:01,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:24:01,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,941 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 249 [2023-11-12 02:24:01,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:24:01,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:24:01,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:24:01,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:24:01,954 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:01,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:02,003 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:24:02,005 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:24:02,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:24:02,005 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:24:02,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (1/1) ... [2023-11-12 02:24:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:24:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:02,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:24:02,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:24:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:24:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:24:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:24:02,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:24:02,122 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:24:02,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:24:02,122 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:24:02,123 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:24:02,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:24:02,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:24:02,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:24:02,129 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 02:24:02,409 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:24:02,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:24:02,781 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:24:02,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:24:02,792 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-12 02:24:02,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:24:02 BoogieIcfgContainer [2023-11-12 02:24:02,795 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:24:02,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:24:02,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:24:02,802 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:24:02,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:24:01" (1/3) ... [2023-11-12 02:24:02,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d58f2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:24:02, skipping insertion in model container [2023-11-12 02:24:02,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:01" (2/3) ... [2023-11-12 02:24:02,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d58f2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:24:02, skipping insertion in model container [2023-11-12 02:24:02,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:24:02" (3/3) ... [2023-11-12 02:24:02,805 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-11-12 02:24:02,813 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:24:02,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:24:02,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-12 02:24:02,822 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:24:02,930 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:24:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 254 transitions, 515 flow [2023-11-12 02:24:03,135 INFO L124 PetriNetUnfolderBase]: 73/394 cut-off events. [2023-11-12 02:24:03,135 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:24:03,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1779 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2023-11-12 02:24:03,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 254 transitions, 515 flow [2023-11-12 02:24:03,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 249 transitions, 502 flow [2023-11-12 02:24:03,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:24:03,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 249 transitions, 502 flow [2023-11-12 02:24:03,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 249 transitions, 502 flow [2023-11-12 02:24:03,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 249 transitions, 502 flow [2023-11-12 02:24:03,285 INFO L124 PetriNetUnfolderBase]: 72/389 cut-off events. [2023-11-12 02:24:03,285 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:03,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 389 events. 72/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1727 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2023-11-12 02:24:03,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 21024 [2023-11-12 02:24:07,296 INFO L134 LiptonReduction]: Checked pairs total: 33802 [2023-11-12 02:24:07,301 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-11-12 02:24:07,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:24:07,323 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;@60b26a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:24:07,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:24:07,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:24:07,330 INFO L124 PetriNetUnfolderBase]: 12/39 cut-off events. [2023-11-12 02:24:07,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:07,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:24:07,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:07,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1491114038, now seen corresponding path program 1 times [2023-11-12 02:24:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:07,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326760429] [2023-11-12 02:24:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:07,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:07,631 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 02:24:07,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326760429] [2023-11-12 02:24:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326760429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:07,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:07,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:24:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393292822] [2023-11-12 02:24:07,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:07,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:07,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:07,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 451 [2023-11-12 02:24:07,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 98 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:07,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:07,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 451 [2023-11-12 02:24:07,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:07,955 INFO L124 PetriNetUnfolderBase]: 631/1309 cut-off events. [2023-11-12 02:24:07,956 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:07,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 1309 events. 631/1309 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7287 event pairs, 512 based on Foata normal form. 190/1257 useless extension candidates. Maximal degree in co-relation 2385. Up to 1159 conditions per place. [2023-11-12 02:24:07,968 INFO L140 encePairwiseOnDemand]: 416/451 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-12 02:24:07,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 248 flow [2023-11-12 02:24:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 703 transitions. [2023-11-12 02:24:07,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195861049519586 [2023-11-12 02:24:07,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 703 transitions. [2023-11-12 02:24:07,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 703 transitions. [2023-11-12 02:24:07,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:07,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 703 transitions. [2023-11-12 02:24:07,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,010 INFO L175 Difference]: Start difference. First operand has 63 places, 98 transitions, 200 flow. Second operand 3 states and 703 transitions. [2023-11-12 02:24:08,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 248 flow [2023-11-12 02:24:08,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:24:08,017 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 148 flow [2023-11-12 02:24:08,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2023-11-12 02:24:08,023 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-12 02:24:08,023 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 148 flow [2023-11-12 02:24:08,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:08,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:08,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:24:08,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:24:08,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash 907779798, now seen corresponding path program 1 times [2023-11-12 02:24:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:08,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614073219] [2023-11-12 02:24:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:24:08,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614073219] [2023-11-12 02:24:08,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614073219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:08,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158881966] [2023-11-12 02:24:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:08,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:08,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:08,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:24:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:08,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:24:08,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:24:08,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:24:08,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158881966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:08,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:08,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:24:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261128493] [2023-11-12 02:24:08,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:24:08,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:24:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:24:08,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 451 [2023-11-12 02:24:08,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:08,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 451 [2023-11-12 02:24:08,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:08,655 INFO L124 PetriNetUnfolderBase]: 631/1312 cut-off events. [2023-11-12 02:24:08,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:08,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1312 events. 631/1312 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7293 event pairs, 512 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 2477. Up to 1159 conditions per place. [2023-11-12 02:24:08,666 INFO L140 encePairwiseOnDemand]: 448/451 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-11-12 02:24:08,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 276 flow [2023-11-12 02:24:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:24:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:24:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1285 transitions. [2023-11-12 02:24:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47487065779748705 [2023-11-12 02:24:08,672 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1285 transitions. [2023-11-12 02:24:08,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1285 transitions. [2023-11-12 02:24:08,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:08,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1285 transitions. [2023-11-12 02:24:08,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.16666666666666) internal successors, (1285), 6 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 451.0) internal successors, (3157), 7 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,687 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 451.0) internal successors, (3157), 7 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,688 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 148 flow. Second operand 6 states and 1285 transitions. [2023-11-12 02:24:08,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 276 flow [2023-11-12 02:24:08,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:24:08,691 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 180 flow [2023-11-12 02:24:08,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-11-12 02:24:08,693 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-11-12 02:24:08,693 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 180 flow [2023-11-12 02:24:08,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:08,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:08,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:24:08,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:24:08,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:08,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:24:08,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1036611949, now seen corresponding path program 2 times [2023-11-12 02:24:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:08,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805278770] [2023-11-12 02:24:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:08,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:24:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805278770] [2023-11-12 02:24:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805278770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149568329] [2023-11-12 02:24:09,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:24:09,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:09,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:09,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:24:09,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:24:09,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:09,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:24:09,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:24:09,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:24:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149568329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:09,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:24:09,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522114330] [2023-11-12 02:24:09,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:09,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:24:09,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:09,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:24:09,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:24:09,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 451 [2023-11-12 02:24:09,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 205.30769230769232) internal successors, (2669), 13 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:09,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 451 [2023-11-12 02:24:09,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:09,702 INFO L124 PetriNetUnfolderBase]: 631/1318 cut-off events. [2023-11-12 02:24:09,702 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-12 02:24:09,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 1318 events. 631/1318 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7279 event pairs, 512 based on Foata normal form. 6/1083 useless extension candidates. Maximal degree in co-relation 2468. Up to 1159 conditions per place. [2023-11-12 02:24:09,713 INFO L140 encePairwiseOnDemand]: 448/451 looper letters, 53 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-11-12 02:24:09,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 344 flow [2023-11-12 02:24:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:24:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:24:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2518 transitions. [2023-11-12 02:24:09,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46526237989652625 [2023-11-12 02:24:09,725 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2518 transitions. [2023-11-12 02:24:09,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2518 transitions. [2023-11-12 02:24:09,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:09,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2518 transitions. [2023-11-12 02:24:09,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.83333333333334) internal successors, (2518), 12 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 451.0) internal successors, (5863), 13 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,755 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 451.0) internal successors, (5863), 13 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,756 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 180 flow. Second operand 12 states and 2518 transitions. [2023-11-12 02:24:09,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 344 flow [2023-11-12 02:24:09,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 330 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:24:09,761 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 250 flow [2023-11-12 02:24:09,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2023-11-12 02:24:09,762 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2023-11-12 02:24:09,762 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 250 flow [2023-11-12 02:24:09,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.30769230769232) internal successors, (2669), 13 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:09,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:09,765 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-12 02:24:09,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:09,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:09,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:24:09,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2068015181, now seen corresponding path program 3 times [2023-11-12 02:24:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442529660] [2023-11-12 02:24:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:24:10,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:24:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:24:10,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:24:10,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:24:10,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:24:10,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:24:10,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:24:10,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:24:10,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:24:10,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:24:10,056 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-12 02:24:10,059 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:24:10,059 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:24:10,112 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:24:10,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 672 flow [2023-11-12 02:24:10,220 INFO L124 PetriNetUnfolderBase]: 118/634 cut-off events. [2023-11-12 02:24:10,220 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:24:10,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 634 events. 118/634 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3311 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2023-11-12 02:24:10,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 672 flow [2023-11-12 02:24:10,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 672 flow [2023-11-12 02:24:10,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:24:10,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 328 transitions, 672 flow [2023-11-12 02:24:10,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 328 transitions, 672 flow [2023-11-12 02:24:10,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 672 flow [2023-11-12 02:24:10,353 INFO L124 PetriNetUnfolderBase]: 118/634 cut-off events. [2023-11-12 02:24:10,353 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:24:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 634 events. 118/634 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3311 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2023-11-12 02:24:10,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 54000 [2023-11-12 02:24:14,776 INFO L134 LiptonReduction]: Checked pairs total: 88144 [2023-11-12 02:24:14,777 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-12 02:24:14,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:24:14,780 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;@60b26a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:24:14,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 02:24:14,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:24:14,785 INFO L124 PetriNetUnfolderBase]: 15/44 cut-off events. [2023-11-12 02:24:14,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:14,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:14,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:14,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:24:14,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 938920425, now seen corresponding path program 1 times [2023-11-12 02:24:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:14,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268371180] [2023-11-12 02:24:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,817 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 02:24:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:14,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268371180] [2023-11-12 02:24:14,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268371180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:14,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:24:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939240679] [2023-11-12 02:24:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:14,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:14,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 587 [2023-11-12 02:24:14,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 135 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:14,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:14,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 587 [2023-11-12 02:24:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:18,531 INFO L124 PetriNetUnfolderBase]: 19933/30665 cut-off events. [2023-11-12 02:24:18,532 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-12 02:24:18,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58978 conditions, 30665 events. 19933/30665 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 212586 event pairs, 17166 based on Foata normal form. 5463/30479 useless extension candidates. Maximal degree in co-relation 20163. Up to 28224 conditions per place. [2023-11-12 02:24:18,894 INFO L140 encePairwiseOnDemand]: 541/587 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-12 02:24:18,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 352 flow [2023-11-12 02:24:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-11-12 02:24:18,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173197047132311 [2023-11-12 02:24:18,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-11-12 02:24:18,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-11-12 02:24:18,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:18,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-11-12 02:24:18,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:18,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:18,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:18,908 INFO L175 Difference]: Start difference. First operand has 87 places, 135 transitions, 286 flow. Second operand 3 states and 911 transitions. [2023-11-12 02:24:18,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 352 flow [2023-11-12 02:24:18,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:24:18,917 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 212 flow [2023-11-12 02:24:18,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-11-12 02:24:18,920 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-11-12 02:24:18,920 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 212 flow [2023-11-12 02:24:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:18,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:18,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:18,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:24:18,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:24:18,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1603885555, now seen corresponding path program 1 times [2023-11-12 02:24:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561011967] [2023-11-12 02:24:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:18,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561011967] [2023-11-12 02:24:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561011967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056862979] [2023-11-12 02:24:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:18,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:18,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:18,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:19,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:24:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:19,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:24:19,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:24:19,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:24:19,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056862979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:19,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:24:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:24:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677569028] [2023-11-12 02:24:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:19,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:24:19,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 587 [2023-11-12 02:24:19,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:19,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:19,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 587 [2023-11-12 02:24:19,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:21,813 INFO L124 PetriNetUnfolderBase]: 20076/30845 cut-off events. [2023-11-12 02:24:21,813 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-12 02:24:21,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59136 conditions, 30845 events. 20076/30845 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 212961 event pairs, 11814 based on Foata normal form. 0/25256 useless extension candidates. Maximal degree in co-relation 59123. Up to 28177 conditions per place. [2023-11-12 02:24:21,996 INFO L140 encePairwiseOnDemand]: 584/587 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-12 02:24:21,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 434 flow [2023-11-12 02:24:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:24:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-11-12 02:24:22,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025553662691652 [2023-11-12 02:24:22,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-11-12 02:24:22,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-11-12 02:24:22,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:22,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-11-12 02:24:22,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:22,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:22,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 587.0) internal successors, (2348), 4 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:22,011 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 212 flow. Second operand 3 states and 885 transitions. [2023-11-12 02:24:22,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 434 flow [2023-11-12 02:24:22,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 430 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:24:22,019 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 220 flow [2023-11-12 02:24:22,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-11-12 02:24:22,024 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-11-12 02:24:22,025 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 220 flow [2023-11-12 02:24:22,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:22,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:22,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:22,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:22,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:24:22,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:24:22,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1602755170, now seen corresponding path program 1 times [2023-11-12 02:24:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:22,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011783838] [2023-11-12 02:24:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011783838] [2023-11-12 02:24:22,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011783838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375209146] [2023-11-12 02:24:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:22,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:22,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:22,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:24:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:22,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:24:22,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:22,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375209146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:22,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:22,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:24:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29723660] [2023-11-12 02:24:22,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:22,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:24:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:24:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:24:22,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 587 [2023-11-12 02:24:22,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 265.14285714285717) internal successors, (1856), 7 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:22,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:22,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 587 [2023-11-12 02:24:22,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:25,362 INFO L124 PetriNetUnfolderBase]: 20049/30704 cut-off events. [2023-11-12 02:24:25,362 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-11-12 02:24:25,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59593 conditions, 30704 events. 20049/30704 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 211048 event pairs, 17166 based on Foata normal form. 3/25261 useless extension candidates. Maximal degree in co-relation 59565. Up to 28195 conditions per place. [2023-11-12 02:24:25,515 INFO L140 encePairwiseOnDemand]: 584/587 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-12 02:24:25,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 390 flow [2023-11-12 02:24:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:24:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:24:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1659 transitions. [2023-11-12 02:24:25,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47103918228279384 [2023-11-12 02:24:25,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1659 transitions. [2023-11-12 02:24:25,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1659 transitions. [2023-11-12 02:24:25,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:25,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1659 transitions. [2023-11-12 02:24:25,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.5) internal successors, (1659), 6 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:25,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:25,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:25,540 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 220 flow. Second operand 6 states and 1659 transitions. [2023-11-12 02:24:25,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 390 flow [2023-11-12 02:24:25,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:24:25,544 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 254 flow [2023-11-12 02:24:25,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-11-12 02:24:25,545 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-11-12 02:24:25,546 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 254 flow [2023-11-12 02:24:25,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.14285714285717) internal successors, (1856), 7 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:25,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:25,547 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:25,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:24:25,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:24:25,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash -178246790, now seen corresponding path program 2 times [2023-11-12 02:24:25,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:25,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248970422] [2023-11-12 02:24:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:24:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:25,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248970422] [2023-11-12 02:24:25,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248970422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591688437] [2023-11-12 02:24:25,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:24:25,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:25,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:25,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:24:25,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:24:25,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:25,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:24:25,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:26,009 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 7 treesize of output 6 [2023-11-12 02:24:26,068 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:24:26,069 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 11 treesize of output 11 [2023-11-12 02:24:26,096 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 15 treesize of output 10 [2023-11-12 02:24:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:24:26,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:24:26,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591688437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:26,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:24:26,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-12 02:24:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253970110] [2023-11-12 02:24:26,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:24:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:24:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:24:26,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 587 [2023-11-12 02:24:26,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:26,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:26,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 587 [2023-11-12 02:24:26,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:30,172 INFO L124 PetriNetUnfolderBase]: 24612/38875 cut-off events. [2023-11-12 02:24:30,172 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2023-11-12 02:24:30,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75551 conditions, 38875 events. 24612/38875 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 291097 event pairs, 4085 based on Foata normal form. 0/32225 useless extension candidates. Maximal degree in co-relation 75515. Up to 27906 conditions per place. [2023-11-12 02:24:30,396 INFO L140 encePairwiseOnDemand]: 576/587 looper letters, 188 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2023-11-12 02:24:30,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 224 transitions, 951 flow [2023-11-12 02:24:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:24:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:24:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1709 transitions. [2023-11-12 02:24:30,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852356615559341 [2023-11-12 02:24:30,408 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1709 transitions. [2023-11-12 02:24:30,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1709 transitions. [2023-11-12 02:24:30,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:30,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1709 transitions. [2023-11-12 02:24:30,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.8333333333333) internal successors, (1709), 6 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:30,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:30,429 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 587.0) internal successors, (4109), 7 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:30,429 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 254 flow. Second operand 6 states and 1709 transitions. [2023-11-12 02:24:30,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 224 transitions, 951 flow [2023-11-12 02:24:30,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 937 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:24:30,437 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 349 flow [2023-11-12 02:24:30,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-12 02:24:30,438 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 19 predicate places. [2023-11-12 02:24:30,438 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 349 flow [2023-11-12 02:24:30,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:30,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:24:30,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:24:30,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:24:30,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:30,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2036350279, now seen corresponding path program 1 times [2023-11-12 02:24:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:30,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116609903] [2023-11-12 02:24:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:24:30,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:30,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116609903] [2023-11-12 02:24:30,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116609903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:30,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441052254] [2023-11-12 02:24:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:30,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:30,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:30,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:24:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:30,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:24:30,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:24:30,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:24:30,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441052254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:30,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:30,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-12 02:24:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274869400] [2023-11-12 02:24:30,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:24:30,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:30,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:24:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:24:31,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 587 [2023-11-12 02:24:31,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 349 flow. Second operand has 14 states, 14 states have (on average 260.92857142857144) internal successors, (3653), 14 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 587 [2023-11-12 02:24:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:24:35,096 INFO L124 PetriNetUnfolderBase]: 24706/38917 cut-off events. [2023-11-12 02:24:35,096 INFO L125 PetriNetUnfolderBase]: For 7602/7602 co-relation queries the response was YES. [2023-11-12 02:24:35,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83543 conditions, 38917 events. 24706/38917 cut-off events. For 7602/7602 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 293881 event pairs, 341 based on Foata normal form. 31/34403 useless extension candidates. Maximal degree in co-relation 83485. Up to 34896 conditions per place. [2023-11-12 02:24:35,349 INFO L140 encePairwiseOnDemand]: 582/587 looper letters, 146 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2023-11-12 02:24:35,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 873 flow [2023-11-12 02:24:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:24:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:24:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3769 transitions. [2023-11-12 02:24:35,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586274032611341 [2023-11-12 02:24:35,367 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3769 transitions. [2023-11-12 02:24:35,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3769 transitions. [2023-11-12 02:24:35,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:24:35,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3769 transitions. [2023-11-12 02:24:35,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 269.2142857142857) internal successors, (3769), 14 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:35,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 587.0) internal successors, (8805), 15 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:35,425 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 587.0) internal successors, (8805), 15 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:35,425 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 349 flow. Second operand 14 states and 3769 transitions. [2023-11-12 02:24:35,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 873 flow [2023-11-12 02:24:35,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 873 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:24:35,457 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 419 flow [2023-11-12 02:24:35,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=587, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=419, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-11-12 02:24:35,458 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 33 predicate places. [2023-11-12 02:24:35,458 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 419 flow [2023-11-12 02:24:35,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 260.92857142857144) internal successors, (3653), 14 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:35,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:35,460 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 02:24:35,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e89587f9-226e-47bd-9e3c-497309b97218/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:35,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:24:35,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1809650332, now seen corresponding path program 1 times [2023-11-12 02:24:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449196424] [2023-11-12 02:24:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:35,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:24:35,703 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:24:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:24:35,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:24:35,742 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:24:35,743 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-12 02:24:35,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-12 02:24:35,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-12 02:24:35,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-12 02:24:35,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-12 02:24:35,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-12 02:24:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:24:35,744 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-11-12 02:24:35,745 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:24:35,746 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:24:35,806 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:24:35,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 402 transitions, 831 flow [2023-11-12 02:24:36,008 INFO L124 PetriNetUnfolderBase]: 168/909 cut-off events. [2023-11-12 02:24:36,009 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:24:36,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 909 events. 168/909 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5043 event pairs, 1 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 642. Up to 16 conditions per place. [2023-11-12 02:24:36,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 402 transitions, 831 flow [2023-11-12 02:24:36,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 402 transitions, 831 flow [2023-11-12 02:24:36,042 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:24:36,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 402 transitions, 831 flow [2023-11-12 02:24:36,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 402 transitions, 831 flow [2023-11-12 02:24:36,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 402 transitions, 831 flow [2023-11-12 02:24:36,205 INFO L124 PetriNetUnfolderBase]: 168/909 cut-off events. [2023-11-12 02:24:36,205 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:24:36,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 909 events. 168/909 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5043 event pairs, 1 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 642. Up to 16 conditions per place. [2023-11-12 02:24:36,284 INFO L119 LiptonReduction]: Number of co-enabled transitions 97200 [2023-11-12 02:24:41,074 INFO L134 LiptonReduction]: Checked pairs total: 164912 [2023-11-12 02:24:41,074 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-11-12 02:24:41,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:24:41,077 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;@60b26a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:24:41,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-12 02:24:41,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:24:41,080 INFO L124 PetriNetUnfolderBase]: 12/38 cut-off events. [2023-11-12 02:24:41,080 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:24:41,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:24:41,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:41,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-12 02:24:41,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1521540142, now seen corresponding path program 1 times [2023-11-12 02:24:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:41,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860078149] [2023-11-12 02:24:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:41,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:41,107 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 02:24:41,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860078149] [2023-11-12 02:24:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860078149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:41,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:41,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:24:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338592673] [2023-11-12 02:24:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:41,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 708 [2023-11-12 02:24:41,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 171 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:24:41,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:24:41,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 708 [2023-11-12 02:24:41,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand