./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.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_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/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_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/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_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:46,656 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:46,769 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:46,776 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:46,777 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:46,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:46,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:46,819 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:46,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:46,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:46,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:46,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:46,827 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:46,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:46,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:46,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:46,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:46,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:46,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:46,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:46,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:46,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:46,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:46,834 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:46,834 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:46,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:46,836 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:46,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:46,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:46,837 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:46,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:46,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:46,839 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:46,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:46,840 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:46,840 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:46,840 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:46,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:46,841 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:46,841 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_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2023-11-12 02:21:47,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:47,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:47,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:47,193 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:47,193 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:47,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-11-12 02:21:50,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:50,607 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:50,608 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-11-12 02:21:50,626 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/data/4167085bc/d775486225704e189580c4d7076a21ec/FLAG48fd5bab4 [2023-11-12 02:21:50,642 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/data/4167085bc/d775486225704e189580c4d7076a21ec [2023-11-12 02:21:50,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:50,650 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:50,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:50,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:50,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:50,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:50" (1/1) ... [2023-11-12 02:21:50,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1077cf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:50, skipping insertion in model container [2023-11-12 02:21:50,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:50" (1/1) ... [2023-11-12 02:21:50,712 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:51,174 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_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-11-12 02:21:51,188 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,189 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,190 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,190 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:51,239 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:51,289 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_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-11-12 02:21:51,293 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,293 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,294 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,294 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:21:51,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:51,446 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:51,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51 WrapperNode [2023-11-12 02:21:51,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:51,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:51,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:51,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:51,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,547 INFO L138 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 231 [2023-11-12 02:21:51,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:51,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:51,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:51,558 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:51,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,585 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:51,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:51,608 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:51,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:51,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (1/1) ... [2023-11-12 02:21:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:51,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:51,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:51,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:21:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:21:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:21:51,699 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:21:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:51,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:51,703 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 02:21:51,874 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:51,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:52,312 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:52,325 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:52,325 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-12 02:21:52,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:52 BoogieIcfgContainer [2023-11-12 02:21:52,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:52,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:52,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:52,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:52,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:50" (1/3) ... [2023-11-12 02:21:52,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea78f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:52, skipping insertion in model container [2023-11-12 02:21:52,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:51" (2/3) ... [2023-11-12 02:21:52,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea78f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:52, skipping insertion in model container [2023-11-12 02:21:52,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:52" (3/3) ... [2023-11-12 02:21:52,338 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2023-11-12 02:21:52,347 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:21:52,360 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:52,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:52,360 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:21:52,465 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:21:52,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 529 flow [2023-11-12 02:21:52,723 INFO L124 PetriNetUnfolderBase]: 29/280 cut-off events. [2023-11-12 02:21:52,724 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:21:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 280 events. 29/280 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 596 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 158. Up to 4 conditions per place. [2023-11-12 02:21:52,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 529 flow [2023-11-12 02:21:52,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 256 transitions, 516 flow [2023-11-12 02:21:52,748 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:52,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 256 transitions, 516 flow [2023-11-12 02:21:52,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 256 transitions, 516 flow [2023-11-12 02:21:52,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 256 transitions, 516 flow [2023-11-12 02:21:52,874 INFO L124 PetriNetUnfolderBase]: 28/275 cut-off events. [2023-11-12 02:21:52,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:21:52,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 275 events. 28/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 547 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 158. Up to 4 conditions per place. [2023-11-12 02:21:52,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 4550 [2023-11-12 02:22:10,569 WARN L293 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-12 02:22:22,079 INFO L134 LiptonReduction]: Checked pairs total: 4262 [2023-11-12 02:22:22,080 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-11-12 02:22:22,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:22,101 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;@75a4f0c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:22,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:22:22,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:22:22,108 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-12 02:22:22,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:22:22,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:22,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-12 02:22:22,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:22,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1439128457, now seen corresponding path program 1 times [2023-11-12 02:22:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:22,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353695356] [2023-11-12 02:22:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:22,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:22,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353695356] [2023-11-12 02:22:22,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353695356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:22,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:22,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:22,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695043586] [2023-11-12 02:22:22,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:22,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:22,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 526 [2023-11-12 02:22:22,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:22,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:22,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 526 [2023-11-12 02:22:22,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:22,865 INFO L124 PetriNetUnfolderBase]: 48/113 cut-off events. [2023-11-12 02:22:22,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:22:22,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-11-12 02:22:22,868 INFO L140 encePairwiseOnDemand]: 513/526 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-12 02:22:22,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 112 flow [2023-11-12 02:22:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-11-12 02:22:22,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46387832699619774 [2023-11-12 02:22:22,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-11-12 02:22:22,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-11-12 02:22:22,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:22,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-11-12 02:22:22,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:22,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:22,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:22,917 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 76 flow. Second operand 3 states and 732 transitions. [2023-11-12 02:22:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 112 flow [2023-11-12 02:22:22,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:22:22,923 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 68 flow [2023-11-12 02:22:22,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-12 02:22:22,929 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-12 02:22:22,929 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 68 flow [2023-11-12 02:22:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:22,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:22,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:22,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:22:22,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:22,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 64048467, now seen corresponding path program 1 times [2023-11-12 02:22:22,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126738097] [2023-11-12 02:22:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:22,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126738097] [2023-11-12 02:22:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126738097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:23,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:23,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029949515] [2023-11-12 02:22:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:23,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:23,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 526 [2023-11-12 02:22:23,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 68 flow. Second operand has 3 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 02:22:23,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:23,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 526 [2023-11-12 02:22:23,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:23,554 INFO L124 PetriNetUnfolderBase]: 48/115 cut-off events. [2023-11-12 02:22:23,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:22:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 115 events. 48/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 210. Up to 100 conditions per place. [2023-11-12 02:22:23,556 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-12 02:22:23,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 118 flow [2023-11-12 02:22:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2023-11-12 02:22:23,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45627376425855515 [2023-11-12 02:22:23,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2023-11-12 02:22:23,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2023-11-12 02:22:23,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:23,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2023-11-12 02:22:23,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:23,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:23,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:23,572 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 68 flow. Second operand 3 states and 720 transitions. [2023-11-12 02:22:23,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 118 flow [2023-11-12 02:22:23,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:23,574 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2023-11-12 02:22:23,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-12 02:22:23,575 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-12 02:22:23,575 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2023-11-12 02:22:23,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 02:22:23,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:23,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:23,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:22:23,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:23,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash -760695699, now seen corresponding path program 1 times [2023-11-12 02:22:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947230002] [2023-11-12 02:22:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:23,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:23,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688179801] [2023-11-12 02:22:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:23,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:23,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:23,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:23,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:22:23,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:23,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:23,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:23,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947230002] [2023-11-12 02:22:23,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:23,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688179801] [2023-11-12 02:22:23,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688179801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:23,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:23,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-12 02:22:23,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596536893] [2023-11-12 02:22:23,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:23,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:23,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:23,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:23,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:24,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-12 02:22:24,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 232.83333333333334) internal successors, (1397), 6 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:24,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:24,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-12 02:22:24,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:24,547 INFO L124 PetriNetUnfolderBase]: 48/121 cut-off events. [2023-11-12 02:22:24,547 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:22:24,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 121 events. 48/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 33 based on Foata normal form. 6/102 useless extension candidates. Maximal degree in co-relation 217. Up to 100 conditions per place. [2023-11-12 02:22:24,548 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-12 02:22:24,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 146 flow [2023-11-12 02:22:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:22:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1415 transitions. [2023-11-12 02:22:24,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44835234474017743 [2023-11-12 02:22:24,556 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1415 transitions. [2023-11-12 02:22:24,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1415 transitions. [2023-11-12 02:22:24,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:24,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1415 transitions. [2023-11-12 02:22:24,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.83333333333334) internal successors, (1415), 6 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:24,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:24,575 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:24,575 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 6 states and 1415 transitions. [2023-11-12 02:22:24,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 146 flow [2023-11-12 02:22:24,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:24,578 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 118 flow [2023-11-12 02:22:24,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-12 02:22:24,579 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-11-12 02:22:24,579 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 118 flow [2023-11-12 02:22:24,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 232.83333333333334) internal successors, (1397), 6 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:24,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:24,581 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:24,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:24,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:24,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:24,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:24,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1308671021, now seen corresponding path program 2 times [2023-11-12 02:22:24,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945623171] [2023-11-12 02:22:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:24,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:24,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705436558] [2023-11-12 02:22:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:22:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:24,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:24,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:25,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:22:25,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:25,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:25,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:25,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:25,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945623171] [2023-11-12 02:22:25,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705436558] [2023-11-12 02:22:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705436558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:25,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:25,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 02:22:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744424498] [2023-11-12 02:22:25,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:25,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:22:25,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:25,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:22:25,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:22:25,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-12 02:22:25,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 232.41666666666666) internal successors, (2789), 12 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:25,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:25,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-12 02:22:25,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:26,222 INFO L124 PetriNetUnfolderBase]: 48/133 cut-off events. [2023-11-12 02:22:26,222 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:22:26,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 133 events. 48/133 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 33 based on Foata normal form. 12/120 useless extension candidates. Maximal degree in co-relation 213. Up to 100 conditions per place. [2023-11-12 02:22:26,224 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-11-12 02:22:26,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 220 flow [2023-11-12 02:22:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:22:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:22:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2810 transitions. [2023-11-12 02:22:26,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518377693282635 [2023-11-12 02:22:26,236 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2810 transitions. [2023-11-12 02:22:26,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2810 transitions. [2023-11-12 02:22:26,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:26,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2810 transitions. [2023-11-12 02:22:26,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 234.16666666666666) internal successors, (2810), 12 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:26,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 526.0) internal successors, (6838), 13 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:26,267 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 526.0) internal successors, (6838), 13 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:26,268 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 118 flow. Second operand 12 states and 2810 transitions. [2023-11-12 02:22:26,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 220 flow [2023-11-12 02:22:26,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 206 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:26,272 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 200 flow [2023-11-12 02:22:26,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-11-12 02:22:26,273 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-12 02:22:26,273 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 200 flow [2023-11-12 02:22:26,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 232.41666666666666) internal successors, (2789), 12 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:26,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:26,275 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:26,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:22:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:26,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:26,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash 29597075, now seen corresponding path program 3 times [2023-11-12 02:22:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:26,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887829533] [2023-11-12 02:22:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:26,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949253660] [2023-11-12 02:22:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:22:26,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:26,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:26,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:27,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:22:27,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:27,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:22:27,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:22:27,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:22:27,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:27,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887829533] [2023-11-12 02:22:27,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:27,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949253660] [2023-11-12 02:22:27,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949253660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:27,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-12 02:22:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273298862] [2023-11-12 02:22:27,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:27,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:27,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-12 02:22:27,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 233.16666666666666) internal successors, (1399), 6 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:27,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:27,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-12 02:22:27,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:27,894 INFO L124 PetriNetUnfolderBase]: 50/160 cut-off events. [2023-11-12 02:22:27,894 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-12 02:22:27,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 160 events. 50/160 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-11-12 02:22:27,900 INFO L140 encePairwiseOnDemand]: 522/526 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-12 02:22:27,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 693 flow [2023-11-12 02:22:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:22:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1421 transitions. [2023-11-12 02:22:27,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4502534854245881 [2023-11-12 02:22:27,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1421 transitions. [2023-11-12 02:22:27,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1421 transitions. [2023-11-12 02:22:27,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:27,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1421 transitions. [2023-11-12 02:22:27,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 236.83333333333334) internal successors, (1421), 6 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:27,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:27,923 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:27,923 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 200 flow. Second operand 6 states and 1421 transitions. [2023-11-12 02:22:27,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 693 flow [2023-11-12 02:22:27,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 499 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-11-12 02:22:27,934 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 235 flow [2023-11-12 02:22:27,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-11-12 02:22:27,937 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-12 02:22:27,937 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 235 flow [2023-11-12 02:22:27,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.16666666666666) internal successors, (1399), 6 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:27,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:27,939 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:22:27,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:22:28,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:28,154 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:28,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1766575335, now seen corresponding path program 4 times [2023-11-12 02:22:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:28,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98834522] [2023-11-12 02:22:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:28,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:28,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492895020] [2023-11-12 02:22:28,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:22:28,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:28,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:28,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:30,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:22:30,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:30,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 3621 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:22:30,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-12 02:22:31,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-12 02:22:31,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:31,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98834522] [2023-11-12 02:22:31,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492895020] [2023-11-12 02:22:31,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492895020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:31,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:31,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-12 02:22:31,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531522488] [2023-11-12 02:22:31,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:31,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:22:31,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:31,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:22:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:22:31,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-12 02:22:31,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 235 flow. Second operand has 24 states, 24 states have (on average 232.33333333333334) internal successors, (5576), 24 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:31,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:31,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-12 02:22:31,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:34,435 INFO L124 PetriNetUnfolderBase]: 50/208 cut-off events. [2023-11-12 02:22:34,436 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-11-12 02:22:34,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 208 events. 50/208 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 48/231 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-11-12 02:22:34,438 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-11-12 02:22:34,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 403 flow [2023-11-12 02:22:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:22:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:22:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5600 transitions. [2023-11-12 02:22:34,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435994930291508 [2023-11-12 02:22:34,460 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5600 transitions. [2023-11-12 02:22:34,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5600 transitions. [2023-11-12 02:22:34,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:34,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5600 transitions. [2023-11-12 02:22:34,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 233.33333333333334) internal successors, (5600), 24 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:34,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 526.0) internal successors, (13150), 25 states have internal predecessors, (13150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:34,518 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 526.0) internal successors, (13150), 25 states have internal predecessors, (13150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:34,527 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 235 flow. Second operand 24 states and 5600 transitions. [2023-11-12 02:22:34,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 403 flow [2023-11-12 02:22:34,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:34,532 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 469 flow [2023-11-12 02:22:34,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=469, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-11-12 02:22:34,534 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-11-12 02:22:34,536 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 469 flow [2023-11-12 02:22:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 232.33333333333334) internal successors, (5576), 24 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:34,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:34,539 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:22:34,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:34,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:22:34,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:34,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1853022489, now seen corresponding path program 5 times [2023-11-12 02:22:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:34,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519083102] [2023-11-12 02:22:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:36,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894091730] [2023-11-12 02:22:36,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:22:36,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:36,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:36,293 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:36,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92714fe0-67e2-4c4b-ad9a-332d42dbbe4a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process