./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu --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 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:33:52,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:33:52,769 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:33:52,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:33:52,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:33:52,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:33:52,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:33:52,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:33:52,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:33:52,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:33:52,834 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:33:52,835 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:33:52,835 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:33:52,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:33:52,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:33:52,838 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:33:52,839 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:33:52,839 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:33:52,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:33:52,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:33:52,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:33:52,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:33:52,842 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:33:52,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:33:52,843 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:33:52,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:33:52,844 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:33:52,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:33:52,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:52,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:33:52,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:33:52,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:33:52,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:33:52,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:33:52,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:33:52,849 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:33:52,849 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:33:52,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:33:52,850 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:33:52,850 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_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc [2023-11-19 07:33:53,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:33:53,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:33:53,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:33:53,152 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:33:53,153 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:33:53,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2023-11-19 07:33:56,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:33:56,704 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:33:56,705 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2023-11-19 07:33:56,743 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/data/d8efe8112/2a1f6d86e6634d94bf3f8458ddf0c182/FLAG041274b19 [2023-11-19 07:33:56,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/data/d8efe8112/2a1f6d86e6634d94bf3f8458ddf0c182 [2023-11-19 07:33:56,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:33:56,774 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:33:56,778 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:56,778 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:33:56,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:33:56,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:56" (1/1) ... [2023-11-19 07:33:56,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3148ae12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:56, skipping insertion in model container [2023-11-19 07:33:56,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:56" (1/1) ... [2023-11-19 07:33:56,859 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:33:57,460 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_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2023-11-19 07:33:57,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:57,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:33:57,575 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_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2023-11-19 07:33:57,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:57,663 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:33:57,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57 WrapperNode [2023-11-19 07:33:57,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:57,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:33:57,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:33:57,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:33:57,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,693 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,734 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 205 [2023-11-19 07:33:57,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:33:57,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:33:57,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:33:57,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:33:57,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,784 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,799 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:33:57,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:33:57,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:33:57,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:33:57,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (1/1) ... [2023-11-19 07:33:57,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:57,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:57,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:33:57,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:33:57,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:33:57,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:33:57,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:33:57,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:33:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:33:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:33:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:33:57,904 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:33:57,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:33:57,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:33:57,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:33:57,907 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:33:58,111 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:33:58,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:33:58,478 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:33:58,489 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:33:58,490 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-11-19 07:33:58,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:58 BoogieIcfgContainer [2023-11-19 07:33:58,495 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:33:58,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:33:58,498 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:33:58,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:33:58,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:33:56" (1/3) ... [2023-11-19 07:33:58,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2f333d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:58, skipping insertion in model container [2023-11-19 07:33:58,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:57" (2/3) ... [2023-11-19 07:33:58,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2f333d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:58, skipping insertion in model container [2023-11-19 07:33:58,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:58" (3/3) ... [2023-11-19 07:33:58,506 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-11-19 07:33:58,515 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:33:58,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:33:58,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:33:58,528 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:33:58,614 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:33:58,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 421 flow [2023-11-19 07:33:58,788 INFO L124 PetriNetUnfolderBase]: 43/282 cut-off events. [2023-11-19 07:33:58,797 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:33:58,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 282 events. 43/282 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 887 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-11-19 07:33:58,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 207 transitions, 421 flow [2023-11-19 07:33:58,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 200 transitions, 404 flow [2023-11-19 07:33:58,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:33:58,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 200 transitions, 404 flow [2023-11-19 07:33:58,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 200 transitions, 404 flow [2023-11-19 07:33:58,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 200 transitions, 404 flow [2023-11-19 07:33:58,919 INFO L124 PetriNetUnfolderBase]: 41/275 cut-off events. [2023-11-19 07:33:58,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:33:58,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 275 events. 41/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 868 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-11-19 07:33:58,930 INFO L119 LiptonReduction]: Number of co-enabled transitions 9558 [2023-11-19 07:34:06,546 INFO L134 LiptonReduction]: Checked pairs total: 17432 [2023-11-19 07:34:06,546 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-11-19 07:34:06,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:06,574 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;@48a3fdf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:06,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:34:06,580 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:34:06,592 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-11-19 07:34:06,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:06,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:06,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:34:06,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:34:06,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 750837199, now seen corresponding path program 1 times [2023-11-19 07:34:06,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:06,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344931635] [2023-11-19 07:34:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:07,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:07,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344931635] [2023-11-19 07:34:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344931635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:07,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:07,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:07,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267072117] [2023-11-19 07:34:07,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:07,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:07,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:07,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-11-19 07:34:07,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:07,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:07,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-11-19 07:34:07,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:07,354 INFO L124 PetriNetUnfolderBase]: 274/651 cut-off events. [2023-11-19 07:34:07,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:07,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3566 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-11-19 07:34:07,363 INFO L140 encePairwiseOnDemand]: 352/377 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-19 07:34:07,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 224 flow [2023-11-19 07:34:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-11-19 07:34:07,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53315649867374 [2023-11-19 07:34:07,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-11-19 07:34:07,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-11-19 07:34:07,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:07,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-11-19 07:34:07,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:07,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:07,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:07,408 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 132 flow. Second operand 3 states and 603 transitions. [2023-11-19 07:34:07,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 224 flow [2023-11-19 07:34:07,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:34:07,415 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 96 flow [2023-11-19 07:34:07,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-11-19 07:34:07,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-11-19 07:34:07,422 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 96 flow [2023-11-19 07:34:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:07,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:07,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:34:07,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:34:07,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:34:07,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:07,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1793944681, now seen corresponding path program 1 times [2023-11-19 07:34:07,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:07,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813152235] [2023-11-19 07:34:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:07,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:34:07,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:34:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:34:07,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:34:07,507 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:34:07,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:34:07,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:34:07,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:34:07,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:34:07,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:34:07,513 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:34:07,517 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:34:07,517 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:34:07,558 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:34:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 268 transitions, 552 flow [2023-11-19 07:34:07,654 INFO L124 PetriNetUnfolderBase]: 72/444 cut-off events. [2023-11-19 07:34:07,654 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:34:07,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 444 events. 72/444 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1740 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 284. Up to 12 conditions per place. [2023-11-19 07:34:07,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 268 transitions, 552 flow [2023-11-19 07:34:07,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 266 transitions, 548 flow [2023-11-19 07:34:07,671 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:34:07,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 266 transitions, 548 flow [2023-11-19 07:34:07,671 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 266 transitions, 548 flow [2023-11-19 07:34:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 266 transitions, 548 flow [2023-11-19 07:34:07,755 INFO L124 PetriNetUnfolderBase]: 71/442 cut-off events. [2023-11-19 07:34:07,755 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:34:07,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 442 events. 71/442 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1753 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 282. Up to 12 conditions per place. [2023-11-19 07:34:07,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 27376 [2023-11-19 07:34:15,513 INFO L134 LiptonReduction]: Checked pairs total: 53961 [2023-11-19 07:34:15,513 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-11-19 07:34:15,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:15,517 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;@48a3fdf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:15,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:34:15,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:34:15,522 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-11-19 07:34:15,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:15,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:15,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:34:15,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:34:15,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1267921203, now seen corresponding path program 1 times [2023-11-19 07:34:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:15,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415360224] [2023-11-19 07:34:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:15,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415360224] [2023-11-19 07:34:15,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415360224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:15,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:15,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:15,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750250725] [2023-11-19 07:34:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:15,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:15,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:15,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 481 [2023-11-19 07:34:15,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 99 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:15,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:15,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 481 [2023-11-19 07:34:15,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:17,510 INFO L124 PetriNetUnfolderBase]: 9260/14822 cut-off events. [2023-11-19 07:34:17,510 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-19 07:34:17,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28639 conditions, 14822 events. 9260/14822 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 101588 event pairs, 4140 based on Foata normal form. 3157/15595 useless extension candidates. Maximal degree in co-relation 2306. Up to 13712 conditions per place. [2023-11-19 07:34:17,638 INFO L140 encePairwiseOnDemand]: 446/481 looper letters, 68 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-19 07:34:17,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 324 flow [2023-11-19 07:34:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-11-19 07:34:17,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356895356895357 [2023-11-19 07:34:17,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-11-19 07:34:17,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-11-19 07:34:17,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:17,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-11-19 07:34:17,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:17,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:17,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:17,655 INFO L175 Difference]: Start difference. First operand has 67 places, 99 transitions, 214 flow. Second operand 3 states and 773 transitions. [2023-11-19 07:34:17,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 324 flow [2023-11-19 07:34:17,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:34:17,662 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 162 flow [2023-11-19 07:34:17,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-11-19 07:34:17,663 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-11-19 07:34:17,663 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 162 flow [2023-11-19 07:34:17,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:17,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:17,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:17,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:34:17,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:34:17,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1934934389, now seen corresponding path program 1 times [2023-11-19 07:34:17,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:17,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310957396] [2023-11-19 07:34:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:17,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310957396] [2023-11-19 07:34:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310957396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:17,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251421150] [2023-11-19 07:34:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:17,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:18,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 481 [2023-11-19 07:34:18,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:18,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:18,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 481 [2023-11-19 07:34:18,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:20,441 INFO L124 PetriNetUnfolderBase]: 11570/18732 cut-off events. [2023-11-19 07:34:20,441 INFO L125 PetriNetUnfolderBase]: For 792/792 co-relation queries the response was YES. [2023-11-19 07:34:20,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37230 conditions, 18732 events. 11570/18732 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 135900 event pairs, 3479 based on Foata normal form. 0/16440 useless extension candidates. Maximal degree in co-relation 37117. Up to 11515 conditions per place. [2023-11-19 07:34:20,540 INFO L140 encePairwiseOnDemand]: 468/481 looper letters, 119 selfloop transitions, 13 changer transitions 6/152 dead transitions. [2023-11-19 07:34:20,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 152 transitions, 634 flow [2023-11-19 07:34:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:34:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 992 transitions. [2023-11-19 07:34:20,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155925155925156 [2023-11-19 07:34:20,549 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 992 transitions. [2023-11-19 07:34:20,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 992 transitions. [2023-11-19 07:34:20,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:20,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 992 transitions. [2023-11-19 07:34:20,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:20,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 481.0) internal successors, (2405), 5 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:20,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 481.0) internal successors, (2405), 5 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:20,562 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 162 flow. Second operand 4 states and 992 transitions. [2023-11-19 07:34:20,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 152 transitions, 634 flow [2023-11-19 07:34:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 152 transitions, 631 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:20,571 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 266 flow [2023-11-19 07:34:20,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-11-19 07:34:20,575 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-11-19 07:34:20,575 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 266 flow [2023-11-19 07:34:20,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:20,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:20,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:20,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:34:20,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:34:20,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1552475812, now seen corresponding path program 1 times [2023-11-19 07:34:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:20,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340440962] [2023-11-19 07:34:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:20,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:20,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:20,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340440962] [2023-11-19 07:34:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340440962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362172727] [2023-11-19 07:34:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:20,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:20,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:20,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:20,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:34:20,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:20,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:20,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362172727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:20,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-19 07:34:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504973845] [2023-11-19 07:34:20,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:34:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:34:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:34:21,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 481 [2023-11-19 07:34:21,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:21,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:21,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 481 [2023-11-19 07:34:21,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:21,462 INFO L124 PetriNetUnfolderBase]: 1403/2652 cut-off events. [2023-11-19 07:34:21,462 INFO L125 PetriNetUnfolderBase]: For 1157/1157 co-relation queries the response was YES. [2023-11-19 07:34:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6227 conditions, 2652 events. 1403/2652 cut-off events. For 1157/1157 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16809 event pairs, 151 based on Foata normal form. 313/2865 useless extension candidates. Maximal degree in co-relation 2732. Up to 1690 conditions per place. [2023-11-19 07:34:21,487 INFO L140 encePairwiseOnDemand]: 478/481 looper letters, 92 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-11-19 07:34:21,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 103 transitions, 522 flow [2023-11-19 07:34:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:34:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1179 transitions. [2023-11-19 07:34:21,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49022869022869026 [2023-11-19 07:34:21,493 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1179 transitions. [2023-11-19 07:34:21,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1179 transitions. [2023-11-19 07:34:21,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:21,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1179 transitions. [2023-11-19 07:34:21,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:21,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:21,507 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:21,507 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 266 flow. Second operand 5 states and 1179 transitions. [2023-11-19 07:34:21,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 103 transitions, 522 flow [2023-11-19 07:34:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 522 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:34:21,515 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2023-11-19 07:34:21,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-19 07:34:21,517 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-11-19 07:34:21,517 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2023-11-19 07:34:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:21,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:21,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:34:21,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:21,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d24dfa8-5901-4743-bf3c-2ca40e533eb0/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:21,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:34:21,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2072975048, now seen corresponding path program 1 times [2023-11-19 07:34:21,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:21,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678603774] [2023-11-19 07:34:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:21,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:34:21,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:34:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:34:21,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:34:21,777 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:34:21,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:34:21,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:34:21,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:34:21,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:34:21,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:34:21,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:34:21,778 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:34:21,779 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:34:21,779 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:34:21,814 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:34:21,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 329 transitions, 685 flow [2023-11-19 07:34:21,943 INFO L124 PetriNetUnfolderBase]: 106/641 cut-off events. [2023-11-19 07:34:21,943 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:34:21,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 641 events. 106/641 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2736 event pairs, 1 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2023-11-19 07:34:21,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 329 transitions, 685 flow [2023-11-19 07:34:21,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 327 transitions, 681 flow [2023-11-19 07:34:21,962 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:34:21,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 280 places, 327 transitions, 681 flow [2023-11-19 07:34:21,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 280 places, 327 transitions, 681 flow [2023-11-19 07:34:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 327 transitions, 681 flow [2023-11-19 07:34:22,081 INFO L124 PetriNetUnfolderBase]: 105/639 cut-off events. [2023-11-19 07:34:22,081 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:34:22,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 639 events. 105/639 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2783 event pairs, 1 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-11-19 07:34:22,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 52038 [2023-11-19 07:34:30,299 INFO L134 LiptonReduction]: Checked pairs total: 105178 [2023-11-19 07:34:30,300 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-11-19 07:34:30,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:30,303 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;@48a3fdf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:30,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:34:30,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:34:30,309 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-11-19 07:34:30,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:30,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:30,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:34:30,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:34:30,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1884923707, now seen corresponding path program 1 times [2023-11-19 07:34:30,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:30,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279634659] [2023-11-19 07:34:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:30,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:30,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279634659] [2023-11-19 07:34:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279634659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:30,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:30,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:30,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781525162] [2023-11-19 07:34:30,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:30,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:30,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 586 [2023-11-19 07:34:30,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 129 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:30,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:30,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 586 [2023-11-19 07:34:30,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand