./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd --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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:25:27,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:25:27,579 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:25:27,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:25:27,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:25:27,634 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:25:27,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:25:27,637 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:25:27,638 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:25:27,638 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:25:27,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:25:27,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:25:27,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:25:27,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:25:27,640 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:25:27,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:25:27,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:25:27,641 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:25:27,641 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:25:27,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:25:27,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:25:27,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:25:27,642 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:25:27,642 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:25:27,642 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:25:27,643 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:25:27,643 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:25:27,643 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:25:27,644 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:25:27,644 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:25:27,644 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:25:27,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:25:27,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:25:27,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:25:27,645 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:25:27,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:25:27,646 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd 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 -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2024-11-13 14:25:28,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:25:28,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:25:28,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:25:28,067 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:25:28,067 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:25:28,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/pthread/stack-1.i Unable to find full path for "g++" [2024-11-13 14:25:30,717 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:25:31,171 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:25:31,172 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/sv-benchmarks/c/pthread/stack-1.i [2024-11-13 14:25:31,196 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/data/ded1632bc/bf57ed90b9524474996ec7ff84c8ffb8/FLAGe8b4b2603 [2024-11-13 14:25:31,300 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/data/ded1632bc/bf57ed90b9524474996ec7ff84c8ffb8 [2024-11-13 14:25:31,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:25:31,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:25:31,312 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:25:31,313 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:25:31,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:25:31,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:25:31" (1/1) ... [2024-11-13 14:25:31,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3f137f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:31, skipping insertion in model container [2024-11-13 14:25:31,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:25:31" (1/1) ... [2024-11-13 14:25:31,381 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:25:32,326 WARN L250 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_7028fa78-b4de-47d4-a225-19991bb2a852/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2024-11-13 14:25:32,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:25:32,420 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:25:32,503 WARN L250 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_7028fa78-b4de-47d4-a225-19991bb2a852/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2024-11-13 14:25:32,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:25:32,633 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:25:32,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32 WrapperNode [2024-11-13 14:25:32,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:25:32,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:25:32,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:25:32,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:25:32,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,731 INFO L138 Inliner]: procedures = 280, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 151 [2024-11-13 14:25:32,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:25:32,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:25:32,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:25:32,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:25:32,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,764 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,803 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 7, 8]. 47 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [2, 5, 8]. The 1 writes are split as follows [0, 1, 0]. [2024-11-13 14:25:32,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:25:32,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:25:32,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:25:32,854 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:25:32,855 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (1/1) ... [2024-11-13 14:25:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:25:32,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:32,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:25:32,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:25:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-13 14:25:32,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-13 14:25:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-13 14:25:32,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-13 14:25:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 14:25:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 14:25:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 14:25:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-13 14:25:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:25:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:25:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 14:25:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 14:25:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:25:32,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:25:32,964 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 14:25:33,263 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:25:33,265 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:25:33,682 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:25:33,682 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:25:34,129 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:25:34,129 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 14:25:34,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:34 BoogieIcfgContainer [2024-11-13 14:25:34,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:25:34,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:25:34,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:25:34,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:25:34,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:25:31" (1/3) ... [2024-11-13 14:25:34,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb9d3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:25:34, skipping insertion in model container [2024-11-13 14:25:34,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:25:32" (2/3) ... [2024-11-13 14:25:34,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb9d3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:25:34, skipping insertion in model container [2024-11-13 14:25:34,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:34" (3/3) ... [2024-11-13 14:25:34,152 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-11-13 14:25:34,178 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:25:34,180 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG stack-1.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-13 14:25:34,180 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:25:34,301 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 14:25:34,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-11-13 14:25:34,430 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-13 14:25:34,433 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:25:34,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-11-13 14:25:34,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-11-13 14:25:34,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2024-11-13 14:25:34,459 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:25:34,476 INFO L333 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, 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;@704924a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:25:34,476 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-13 14:25:34,490 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:25:34,491 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-11-13 14:25:34,491 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 14:25:34,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:34,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:34,492 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:34,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash -994558653, now seen corresponding path program 1 times [2024-11-13 14:25:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10235242] [2024-11-13 14:25:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:35,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:35,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10235242] [2024-11-13 14:25:35,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10235242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:35,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:35,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:25:35,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137630575] [2024-11-13 14:25:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:35,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:25:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:25:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:25:35,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-13 14:25:35,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-13 14:25:35,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:35,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-13 14:25:35,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:35,872 INFO L124 PetriNetUnfolderBase]: 307/577 cut-off events. [2024-11-13 14:25:35,873 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-13 14:25:35,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 577 events. 307/577 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2544 event pairs, 53 based on Foata normal form. 43/583 useless extension candidates. Maximal degree in co-relation 1056. Up to 358 conditions per place. [2024-11-13 14:25:35,888 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-11-13 14:25:35,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2024-11-13 14:25:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:25:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:25:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-13 14:25:35,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-11-13 14:25:35,916 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2024-11-13 14:25:35,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2024-11-13 14:25:35,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:25:35,930 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2024-11-13 14:25:35,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-13 14:25:35,941 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-11-13 14:25:35,941 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2024-11-13 14:25:35,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-13 14:25:35,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:35,944 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:35,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:25:35,945 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:35,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1702298210, now seen corresponding path program 1 times [2024-11-13 14:25:35,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:35,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106634179] [2024-11-13 14:25:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:35,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:36,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:36,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106634179] [2024-11-13 14:25:36,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106634179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:36,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205448158] [2024-11-13 14:25:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:36,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:36,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:36,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:25:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:36,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:25:36,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:36,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:36,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:36,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:37,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:37,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205448158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:37,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:37,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-13 14:25:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969999119] [2024-11-13 14:25:37,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:37,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:25:37,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:37,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:25:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:25:37,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:25:37,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2024-11-13 14:25:37,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:37,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:25:37,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:38,395 INFO L124 PetriNetUnfolderBase]: 1257/2341 cut-off events. [2024-11-13 14:25:38,396 INFO L125 PetriNetUnfolderBase]: For 299/301 co-relation queries the response was YES. [2024-11-13 14:25:38,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 2341 events. 1257/2341 cut-off events. For 299/301 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12437 event pairs, 153 based on Foata normal form. 49/2289 useless extension candidates. Maximal degree in co-relation 4364. Up to 365 conditions per place. [2024-11-13 14:25:38,423 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2024-11-13 14:25:38,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2024-11-13 14:25:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:25:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 14:25:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2024-11-13 14:25:38,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2024-11-13 14:25:38,430 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2024-11-13 14:25:38,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2024-11-13 14:25:38,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:25:38,442 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2024-11-13 14:25:38,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2024-11-13 14:25:38,443 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-11-13 14:25:38,443 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2024-11-13 14:25:38,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2024-11-13 14:25:38,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:38,444 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:38,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:25:38,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:38,644 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:38,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:38,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1168112284, now seen corresponding path program 1 times [2024-11-13 14:25:38,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:38,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361772309] [2024-11-13 14:25:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:38,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:38,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:38,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361772309] [2024-11-13 14:25:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361772309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:38,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:25:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048624374] [2024-11-13 14:25:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:38,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:25:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:25:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:25:38,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-13 14:25:38,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-13 14:25:38,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:38,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-13 14:25:38,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:39,274 INFO L124 PetriNetUnfolderBase]: 669/1356 cut-off events. [2024-11-13 14:25:39,274 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-11-13 14:25:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1356 events. 669/1356 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6809 event pairs, 231 based on Foata normal form. 66/1407 useless extension candidates. Maximal degree in co-relation 2919. Up to 634 conditions per place. [2024-11-13 14:25:39,286 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-13 14:25:39,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2024-11-13 14:25:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:25:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:25:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-11-13 14:25:39,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-11-13 14:25:39,289 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2024-11-13 14:25:39,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2024-11-13 14:25:39,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-13 14:25:39,302 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2024-11-13 14:25:39,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-13 14:25:39,303 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2024-11-13 14:25:39,304 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2024-11-13 14:25:39,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-13 14:25:39,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:39,304 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:39,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:25:39,305 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:39,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -82552627, now seen corresponding path program 1 times [2024-11-13 14:25:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:39,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907084316] [2024-11-13 14:25:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:39,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907084316] [2024-11-13 14:25:40,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907084316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:25:40,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:25:40,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:25:40,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217722662] [2024-11-13 14:25:40,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:25:40,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:25:40,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:25:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:25:40,331 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-13 14:25:40,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-11-13 14:25:40,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:40,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-13 14:25:40,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:40,936 INFO L124 PetriNetUnfolderBase]: 840/1701 cut-off events. [2024-11-13 14:25:40,937 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2024-11-13 14:25:40,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3885 conditions, 1701 events. 840/1701 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8908 event pairs, 260 based on Foata normal form. 0/1682 useless extension candidates. Maximal degree in co-relation 3505. Up to 971 conditions per place. [2024-11-13 14:25:40,957 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 61 selfloop transitions, 7 changer transitions 4/84 dead transitions. [2024-11-13 14:25:40,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 451 flow [2024-11-13 14:25:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:25:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:25:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-13 14:25:40,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5705882352941176 [2024-11-13 14:25:40,963 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 97 transitions. [2024-11-13 14:25:40,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 451 flow [2024-11-13 14:25:40,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:25:40,978 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 254 flow [2024-11-13 14:25:40,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-11-13 14:25:40,981 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2024-11-13 14:25:40,981 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 254 flow [2024-11-13 14:25:40,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-11-13 14:25:40,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:40,982 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:40,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:25:40,982 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:40,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1941326712, now seen corresponding path program 1 times [2024-11-13 14:25:40,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:40,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307977345] [2024-11-13 14:25:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:40,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:42,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:42,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307977345] [2024-11-13 14:25:42,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307977345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:42,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124485856] [2024-11-13 14:25:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:42,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:42,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:25:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:42,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 14:25:42,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:42,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:42,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:42,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:42,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-13 14:25:42,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-11-13 14:25:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:43,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:43,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-11-13 14:25:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:43,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124485856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:43,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:43,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-13 14:25:43,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355946993] [2024-11-13 14:25:43,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:43,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:25:43,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:25:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:25:43,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:25:43,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2024-11-13 14:25:43,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:25:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:46,158 INFO L124 PetriNetUnfolderBase]: 1808/3590 cut-off events. [2024-11-13 14:25:46,158 INFO L125 PetriNetUnfolderBase]: For 1659/1659 co-relation queries the response was YES. [2024-11-13 14:25:46,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8175 conditions, 3590 events. 1808/3590 cut-off events. For 1659/1659 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 19660 event pairs, 357 based on Foata normal form. 14/3539 useless extension candidates. Maximal degree in co-relation 7083. Up to 587 conditions per place. [2024-11-13 14:25:46,184 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 204 selfloop transitions, 54 changer transitions 20/283 dead transitions. [2024-11-13 14:25:46,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 283 transitions, 1528 flow [2024-11-13 14:25:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 14:25:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 14:25:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 426 transitions. [2024-11-13 14:25:46,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5447570332480819 [2024-11-13 14:25:46,188 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 254 flow. Second operand 23 states and 426 transitions. [2024-11-13 14:25:46,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 283 transitions, 1528 flow [2024-11-13 14:25:46,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 283 transitions, 1518 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-13 14:25:46,216 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 560 flow [2024-11-13 14:25:46,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=560, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-11-13 14:25:46,217 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2024-11-13 14:25:46,220 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 560 flow [2024-11-13 14:25:46,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2024-11-13 14:25:46,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:46,220 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:46,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:25:46,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:46,421 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:46,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1486337245, now seen corresponding path program 1 times [2024-11-13 14:25:46,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:46,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316290266] [2024-11-13 14:25:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:46,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:25:46,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316290266] [2024-11-13 14:25:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316290266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053205257] [2024-11-13 14:25:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:46,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:46,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:46,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:25:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:47,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 14:25:47,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:47,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:47,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:47,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:47,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:47,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:47,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:47,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:25:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053205257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:47,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-11-13 14:25:47,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608126352] [2024-11-13 14:25:47,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:47,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:25:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:25:47,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:25:47,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:25:47,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 560 flow. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 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) [2024-11-13 14:25:47,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:47,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:25:47,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:50,065 INFO L124 PetriNetUnfolderBase]: 2858/5653 cut-off events. [2024-11-13 14:25:50,066 INFO L125 PetriNetUnfolderBase]: For 5078/5078 co-relation queries the response was YES. [2024-11-13 14:25:50,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13498 conditions, 5653 events. 2858/5653 cut-off events. For 5078/5078 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 32143 event pairs, 419 based on Foata normal form. 66/5661 useless extension candidates. Maximal degree in co-relation 12876. Up to 929 conditions per place. [2024-11-13 14:25:50,125 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 190 selfloop transitions, 91 changer transitions 8/294 dead transitions. [2024-11-13 14:25:50,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 294 transitions, 1880 flow [2024-11-13 14:25:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:25:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 14:25:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 352 transitions. [2024-11-13 14:25:50,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.544891640866873 [2024-11-13 14:25:50,129 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 560 flow. Second operand 19 states and 352 transitions. [2024-11-13 14:25:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 294 transitions, 1880 flow [2024-11-13 14:25:50,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 294 transitions, 1846 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-11-13 14:25:50,184 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1073 flow [2024-11-13 14:25:50,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1073, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-11-13 14:25:50,187 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 75 predicate places. [2024-11-13 14:25:50,188 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1073 flow [2024-11-13 14:25:50,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 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) [2024-11-13 14:25:50,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:50,189 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:25:50,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:25:50,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 14:25:50,389 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:50,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -415002425, now seen corresponding path program 1 times [2024-11-13 14:25:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:50,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287659951] [2024-11-13 14:25:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:52,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287659951] [2024-11-13 14:25:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287659951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650582863] [2024-11-13 14:25:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:52,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:52,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:52,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:52,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:25:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:52,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:25:52,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:52,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 14:25:52,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:52,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:53,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-13 14:25:53,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-11-13 14:25:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:53,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650582863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:54,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-13 14:25:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299383555] [2024-11-13 14:25:54,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:54,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 14:25:54,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 14:25:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:25:54,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:25:54,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1073 flow. Second operand has 15 states, 15 states have (on average 11.066666666666666) internal successors, (166), 15 states have internal predecessors, (166), 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) [2024-11-13 14:25:54,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:25:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:25:57,412 INFO L124 PetriNetUnfolderBase]: 4049/7953 cut-off events. [2024-11-13 14:25:57,412 INFO L125 PetriNetUnfolderBase]: For 10964/10964 co-relation queries the response was YES. [2024-11-13 14:25:57,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20625 conditions, 7953 events. 4049/7953 cut-off events. For 10964/10964 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 48079 event pairs, 1306 based on Foata normal form. 28/7916 useless extension candidates. Maximal degree in co-relation 20089. Up to 2108 conditions per place. [2024-11-13 14:25:57,512 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 204 selfloop transitions, 79 changer transitions 14/302 dead transitions. [2024-11-13 14:25:57,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 302 transitions, 2577 flow [2024-11-13 14:25:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:25:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:25:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 231 transitions. [2024-11-13 14:25:57,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5226244343891403 [2024-11-13 14:25:57,516 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1073 flow. Second operand 13 states and 231 transitions. [2024-11-13 14:25:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 302 transitions, 2577 flow [2024-11-13 14:25:57,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 302 transitions, 2493 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-11-13 14:25:57,611 INFO L231 Difference]: Finished difference. Result has 119 places, 172 transitions, 1607 flow [2024-11-13 14:25:57,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1607, PETRI_PLACES=119, PETRI_TRANSITIONS=172} [2024-11-13 14:25:57,613 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 87 predicate places. [2024-11-13 14:25:57,614 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 172 transitions, 1607 flow [2024-11-13 14:25:57,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.066666666666666) internal successors, (166), 15 states have internal predecessors, (166), 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) [2024-11-13 14:25:57,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:25:57,615 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-13 14:25:57,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:25:57,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 14:25:57,816 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:25:57,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:25:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -527016657, now seen corresponding path program 2 times [2024-11-13 14:25:57,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:25:57,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769397890] [2024-11-13 14:25:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:25:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:25:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:25:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:25:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769397890] [2024-11-13 14:25:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769397890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:25:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294937193] [2024-11-13 14:25:58,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:25:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:25:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:25:58,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:25:58,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:25:58,665 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:25:58,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:25:58,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 14:25:58,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:25:58,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:58,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:25:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:59,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:25:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:25:59,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294937193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:25:59,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:25:59,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-11-13 14:25:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412915595] [2024-11-13 14:25:59,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:25:59,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:25:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:25:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:25:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:25:59,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:25:59,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 172 transitions, 1607 flow. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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) [2024-11-13 14:25:59,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:25:59,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:25:59,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:04,974 INFO L124 PetriNetUnfolderBase]: 11344/22156 cut-off events. [2024-11-13 14:26:04,974 INFO L125 PetriNetUnfolderBase]: For 45502/45502 co-relation queries the response was YES. [2024-11-13 14:26:05,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61510 conditions, 22156 events. 11344/22156 cut-off events. For 45502/45502 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 163856 event pairs, 2253 based on Foata normal form. 415/22569 useless extension candidates. Maximal degree in co-relation 59559. Up to 3703 conditions per place. [2024-11-13 14:26:05,201 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 553 selfloop transitions, 384 changer transitions 2/944 dead transitions. [2024-11-13 14:26:05,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 944 transitions, 8068 flow [2024-11-13 14:26:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-13 14:26:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-13 14:26:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 969 transitions. [2024-11-13 14:26:05,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-11-13 14:26:05,214 INFO L175 Difference]: Start difference. First operand has 119 places, 172 transitions, 1607 flow. Second operand 53 states and 969 transitions. [2024-11-13 14:26:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 944 transitions, 8068 flow [2024-11-13 14:26:05,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 944 transitions, 7963 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-11-13 14:26:05,926 INFO L231 Difference]: Finished difference. Result has 185 places, 458 transitions, 5225 flow [2024-11-13 14:26:05,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=5225, PETRI_PLACES=185, PETRI_TRANSITIONS=458} [2024-11-13 14:26:05,930 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 153 predicate places. [2024-11-13 14:26:05,931 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 458 transitions, 5225 flow [2024-11-13 14:26:05,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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) [2024-11-13 14:26:05,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:26:05,931 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2024-11-13 14:26:05,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 14:26:06,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-13 14:26:06,132 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:26:06,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:26:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2102557834, now seen corresponding path program 3 times [2024-11-13 14:26:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:26:06,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711457870] [2024-11-13 14:26:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:26:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:26:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:26:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:06,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:26:06,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711457870] [2024-11-13 14:26:06,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711457870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:26:06,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248451908] [2024-11-13 14:26:06,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:26:06,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:06,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:26:06,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:26:06,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:26:06,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 14:26:06,943 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:26:06,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:26:06,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:07,014 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:26:07,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248451908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:26:07,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:26:07,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-11-13 14:26:07,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737806285] [2024-11-13 14:26:07,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:26:07,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:26:07,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:26:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:26:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:26:07,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:26:07,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 458 transitions, 5225 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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) [2024-11-13 14:26:07,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:26:07,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:26:07,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:10,607 INFO L124 PetriNetUnfolderBase]: 7281/13693 cut-off events. [2024-11-13 14:26:10,607 INFO L125 PetriNetUnfolderBase]: For 23059/23061 co-relation queries the response was YES. [2024-11-13 14:26:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36780 conditions, 13693 events. 7281/13693 cut-off events. For 23059/23061 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 93931 event pairs, 568 based on Foata normal form. 2/13049 useless extension candidates. Maximal degree in co-relation 36733. Up to 4605 conditions per place. [2024-11-13 14:26:10,726 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 260 selfloop transitions, 10 changer transitions 105/407 dead transitions. [2024-11-13 14:26:10,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 407 transitions, 4625 flow [2024-11-13 14:26:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:26:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 14:26:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-11-13 14:26:10,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6213235294117647 [2024-11-13 14:26:10,728 INFO L175 Difference]: Start difference. First operand has 185 places, 458 transitions, 5225 flow. Second operand 8 states and 169 transitions. [2024-11-13 14:26:10,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 407 transitions, 4625 flow [2024-11-13 14:26:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 407 transitions, 4056 flow, removed 68 selfloop flow, removed 24 redundant places. [2024-11-13 14:26:10,918 INFO L231 Difference]: Finished difference. Result has 147 places, 146 transitions, 1223 flow [2024-11-13 14:26:10,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1223, PETRI_PLACES=147, PETRI_TRANSITIONS=146} [2024-11-13 14:26:10,919 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 115 predicate places. [2024-11-13 14:26:10,919 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 146 transitions, 1223 flow [2024-11-13 14:26:10,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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) [2024-11-13 14:26:10,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:26:10,919 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:26:10,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:26:11,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 14:26:11,125 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:26:11,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:26:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1113642441, now seen corresponding path program 2 times [2024-11-13 14:26:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:26:11,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037977333] [2024-11-13 14:26:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:26:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:26:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:26:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:13,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:26:13,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037977333] [2024-11-13 14:26:13,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037977333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:26:13,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030893529] [2024-11-13 14:26:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:26:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:26:13,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:26:13,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:26:13,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:26:13,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:26:13,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 14:26:13,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:13,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:13,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:13,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:26:14,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:14,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:14,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2024-11-13 14:26:14,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2024-11-13 14:26:14,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-11-13 14:26:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:15,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:26:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030893529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:26:16,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:26:16,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-13 14:26:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531751700] [2024-11-13 14:26:16,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:26:16,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 14:26:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:26:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 14:26:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2024-11-13 14:26:16,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:26:16,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 146 transitions, 1223 flow. Second operand has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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) [2024-11-13 14:26:16,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:26:16,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:26:16,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:21,422 INFO L124 PetriNetUnfolderBase]: 4920/9751 cut-off events. [2024-11-13 14:26:21,423 INFO L125 PetriNetUnfolderBase]: For 21457/21795 co-relation queries the response was YES. [2024-11-13 14:26:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28201 conditions, 9751 events. 4920/9751 cut-off events. For 21457/21795 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 66270 event pairs, 415 based on Foata normal form. 108/9858 useless extension candidates. Maximal degree in co-relation 28169. Up to 1674 conditions per place. [2024-11-13 14:26:21,483 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 196 selfloop transitions, 55 changer transitions 283/538 dead transitions. [2024-11-13 14:26:21,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 538 transitions, 4040 flow [2024-11-13 14:26:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 14:26:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-13 14:26:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 608 transitions. [2024-11-13 14:26:21,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45852187028657615 [2024-11-13 14:26:21,487 INFO L175 Difference]: Start difference. First operand has 147 places, 146 transitions, 1223 flow. Second operand 39 states and 608 transitions. [2024-11-13 14:26:21,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 538 transitions, 4040 flow [2024-11-13 14:26:21,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 538 transitions, 3840 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-11-13 14:26:21,579 INFO L231 Difference]: Finished difference. Result has 169 places, 95 transitions, 784 flow [2024-11-13 14:26:21,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=784, PETRI_PLACES=169, PETRI_TRANSITIONS=95} [2024-11-13 14:26:21,580 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 137 predicate places. [2024-11-13 14:26:21,580 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 95 transitions, 784 flow [2024-11-13 14:26:21,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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) [2024-11-13 14:26:21,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:26:21,581 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:26:21,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:26:21,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:21,781 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:26:21,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:26:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1526623265, now seen corresponding path program 3 times [2024-11-13 14:26:21,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:26:21,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300072204] [2024-11-13 14:26:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:26:21,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:26:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:26:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:26:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300072204] [2024-11-13 14:26:23,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300072204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:26:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837922966] [2024-11-13 14:26:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:26:23,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:23,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:26:23,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:26:23,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:26:24,316 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 14:26:24,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:26:24,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 14:26:24,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:24,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:24,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:24,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 14:26:24,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:24,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-13 14:26:24,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:24,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-13 14:26:24,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:24,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:24,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-13 14:26:25,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:26:25,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 38 [2024-11-13 14:26:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:25,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:26:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837922966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:26:27,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:26:27,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2024-11-13 14:26:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836507491] [2024-11-13 14:26:27,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:26:27,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 14:26:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:26:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 14:26:27,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 14:26:27,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:26:27,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 95 transitions, 784 flow. Second operand has 33 states, 33 states have (on average 10.787878787878787) internal successors, (356), 33 states have internal predecessors, (356), 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) [2024-11-13 14:26:27,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:26:27,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:26:27,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:32,152 INFO L124 PetriNetUnfolderBase]: 1595/3420 cut-off events. [2024-11-13 14:26:32,152 INFO L125 PetriNetUnfolderBase]: For 8505/8549 co-relation queries the response was YES. [2024-11-13 14:26:32,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9644 conditions, 3420 events. 1595/3420 cut-off events. For 8505/8549 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 18674 event pairs, 138 based on Foata normal form. 39/3458 useless extension candidates. Maximal degree in co-relation 9605. Up to 608 conditions per place. [2024-11-13 14:26:32,172 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 113 selfloop transitions, 16 changer transitions 211/344 dead transitions. [2024-11-13 14:26:32,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 344 transitions, 2347 flow [2024-11-13 14:26:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 14:26:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-13 14:26:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 519 transitions. [2024-11-13 14:26:32,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44896193771626297 [2024-11-13 14:26:32,176 INFO L175 Difference]: Start difference. First operand has 169 places, 95 transitions, 784 flow. Second operand 34 states and 519 transitions. [2024-11-13 14:26:32,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 344 transitions, 2347 flow [2024-11-13 14:26:32,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 344 transitions, 2127 flow, removed 48 selfloop flow, removed 36 redundant places. [2024-11-13 14:26:32,213 INFO L231 Difference]: Finished difference. Result has 157 places, 45 transitions, 276 flow [2024-11-13 14:26:32,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=276, PETRI_PLACES=157, PETRI_TRANSITIONS=45} [2024-11-13 14:26:32,214 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2024-11-13 14:26:32,214 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 45 transitions, 276 flow [2024-11-13 14:26:32,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.787878787878787) internal successors, (356), 33 states have internal predecessors, (356), 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) [2024-11-13 14:26:32,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:26:32,215 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:26:32,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:26:32,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:32,419 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-13 14:26:32,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:26:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1600645991, now seen corresponding path program 4 times [2024-11-13 14:26:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:26:32,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385376480] [2024-11-13 14:26:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:26:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:26:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:26:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 58 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:35,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:26:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385376480] [2024-11-13 14:26:35,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385376480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:26:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975046923] [2024-11-13 14:26:35,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:26:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:26:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:26:35,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:26:35,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:26:35,989 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:26:35,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:26:35,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 14:26:36,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:26:36,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 14:26:36,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 14:26:36,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 14:26:36,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 14:26:36,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:26:36,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 14:26:37,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-11-13 14:26:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:37,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:26:41,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:26:41,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:26:41,116 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-13 14:26:41,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 122 [2024-11-13 14:26:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:26:41,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975046923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:26:41,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:26:41,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-11-13 14:26:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85099101] [2024-11-13 14:26:41,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:26:41,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 14:26:41,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:26:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 14:26:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 14:26:41,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-13 14:26:41,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 45 transitions, 276 flow. Second operand has 36 states, 36 states have (on average 11.416666666666666) internal successors, (411), 36 states have internal predecessors, (411), 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) [2024-11-13 14:26:41,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:26:41,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-13 14:26:41,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:26:44,177 INFO L124 PetriNetUnfolderBase]: 483/1053 cut-off events. [2024-11-13 14:26:44,177 INFO L125 PetriNetUnfolderBase]: For 1445/1445 co-relation queries the response was YES. [2024-11-13 14:26:44,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2835 conditions, 1053 events. 483/1053 cut-off events. For 1445/1445 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3486 event pairs, 51 based on Foata normal form. 14/1066 useless extension candidates. Maximal degree in co-relation 2804. Up to 174 conditions per place. [2024-11-13 14:26:44,181 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 0 selfloop transitions, 0 changer transitions 132/132 dead transitions. [2024-11-13 14:26:44,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 132 transitions, 779 flow [2024-11-13 14:26:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:26:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:26:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 250 transitions. [2024-11-13 14:26:44,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43252595155709345 [2024-11-13 14:26:44,184 INFO L175 Difference]: Start difference. First operand has 157 places, 45 transitions, 276 flow. Second operand 17 states and 250 transitions. [2024-11-13 14:26:44,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 132 transitions, 779 flow [2024-11-13 14:26:44,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 132 transitions, 683 flow, removed 9 selfloop flow, removed 42 redundant places. [2024-11-13 14:26:44,189 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2024-11-13 14:26:44,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2024-11-13 14:26:44,191 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2024-11-13 14:26:44,191 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2024-11-13 14:26:44,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.416666666666666) internal successors, (411), 36 states have internal predecessors, (411), 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) [2024-11-13 14:26:44,194 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-13 14:26:44,195 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-13 14:26:44,195 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-13 14:26:44,195 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-13 14:26:44,195 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-13 14:26:44,195 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-13 14:26:44,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:26:44,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 14:26:44,396 INFO L407 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1] [2024-11-13 14:26:44,405 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-13 14:26:44,405 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 14:26:44,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 02:26:44 BasicIcfg [2024-11-13 14:26:44,414 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 14:26:44,415 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 14:26:44,415 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 14:26:44,415 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 14:26:44,416 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:25:34" (3/4) ... [2024-11-13 14:26:44,419 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-13 14:26:44,424 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2024-11-13 14:26:44,425 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2024-11-13 14:26:44,430 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 44 nodes and edges [2024-11-13 14:26:44,430 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-13 14:26:44,431 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-13 14:26:44,431 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-13 14:26:44,561 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/witness.graphml [2024-11-13 14:26:44,561 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/witness.yml [2024-11-13 14:26:44,561 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 14:26:44,563 INFO L158 Benchmark]: Toolchain (without parser) took 73255.27ms. Allocated memory was 117.4MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 90.9MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 907.5MB. Max. memory is 16.1GB. [2024-11-13 14:26:44,563 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:26:44,563 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1324.29ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 60.9MB in the end (delta: 29.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-11-13 14:26:44,564 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.38ms. Allocated memory is still 117.4MB. Free memory was 60.7MB in the beginning and 58.4MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:26:44,564 INFO L158 Benchmark]: Boogie Preprocessor took 119.82ms. Allocated memory is still 117.4MB. Free memory was 58.4MB in the beginning and 56.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:26:44,567 INFO L158 Benchmark]: RCFGBuilder took 1279.61ms. Allocated memory is still 117.4MB. Free memory was 56.2MB in the beginning and 63.1MB in the end (delta: -6.9MB). Peak memory consumption was 30.4MB. Max. memory is 16.1GB. [2024-11-13 14:26:44,567 INFO L158 Benchmark]: TraceAbstraction took 70275.43ms. Allocated memory was 117.4MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 62.5MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 868.6MB. Max. memory is 16.1GB. [2024-11-13 14:26:44,569 INFO L158 Benchmark]: Witness Printer took 146.83ms. Allocated memory is still 2.4GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 14:26:44,572 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1324.29ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 60.9MB in the end (delta: 29.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.38ms. Allocated memory is still 117.4MB. Free memory was 60.7MB in the beginning and 58.4MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 119.82ms. Allocated memory is still 117.4MB. Free memory was 58.4MB in the beginning and 56.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1279.61ms. Allocated memory is still 117.4MB. Free memory was 56.2MB in the beginning and 63.1MB in the end (delta: -6.9MB). Peak memory consumption was 30.4MB. Max. memory is 16.1GB. * TraceAbstraction took 70275.43ms. Allocated memory was 117.4MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 62.5MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 868.6MB. Max. memory is 16.1GB. * Witness Printer took 146.83ms. Allocated memory is still 2.4GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 53 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 70.0s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 33.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3572 SdHoareTripleChecker+Valid, 10.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3567 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 327 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8119 IncrementalHoareTripleChecker+Invalid, 8446 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 327 mSolverCounterUnsat, 2 mSDtfsCounter, 8119 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 869 GetRequests, 564 SyntacticMatches, 3 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5225occurred in iteration=8, InterpolantAutomatonStates: 233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 30.6s InterpolantComputationTime, 708 NumberOfCodeBlocks, 708 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 975 ConstructedInterpolants, 10 QuantifiedInterpolants, 17336 SizeOfPredicates, 126 NumberOfNonLiveVariables, 2323 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 29 InterpolantComputations, 4 PerfectInterpolantSequences, 274/1075 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-13 14:26:44,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7028fa78-b4de-47d4-a225-19991bb2a852/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE