./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU --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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:04,688 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:04,779 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:56:04,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:04,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:04,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:04,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:04,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:04,820 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:04,821 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:04,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:04,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:04,822 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:04,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:04,824 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:04,824 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:04,825 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:56:04,825 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:04,825 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:04,825 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:04,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:04,831 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:56:04,831 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:04,831 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:56:04,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:04,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:04,832 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:56:04,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:04,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:04,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:04,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:04,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:04,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:04,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:04,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:04,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:56:04,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:04,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:04,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:04,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:04,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:04,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:04,837 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-10-31 21:56:05,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:05,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:05,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:05,184 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:05,184 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:05,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c Unable to find full path for "g++" [2024-10-31 21:56:07,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:56:07,436 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:56:07,437 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-10-31 21:56:07,447 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/data/0dcc43d5c/1bcdc785c47c45b39be26b5936f2e241/FLAG5eddaf01f [2024-10-31 21:56:07,787 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/data/0dcc43d5c/1bcdc785c47c45b39be26b5936f2e241 [2024-10-31 21:56:07,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:56:07,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:56:07,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:07,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:56:07,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:56:07,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:07" (1/1) ... [2024-10-31 21:56:07,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d8e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:07, skipping insertion in model container [2024-10-31 21:56:07,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:07" (1/1) ... [2024-10-31 21:56:07,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:56:08,159 WARN L251 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_c654a2ba-51b0-4efc-8e29-9324fb7297eb/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-10-31 21:56:08,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:08,189 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:56:08,226 WARN L251 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_c654a2ba-51b0-4efc-8e29-9324fb7297eb/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-10-31 21:56:08,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:08,253 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:56:08,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08 WrapperNode [2024-10-31 21:56:08,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:08,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:08,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:56:08,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:56:08,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,306 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 272 [2024-10-31 21:56:08,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:08,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:56:08,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:56:08,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:56:08,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,328 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,349 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 21:56:08,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,359 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:56:08,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:56:08,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:56:08,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:56:08,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (1/1) ... [2024-10-31 21:56:08,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:08,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:08,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:56:08,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:56:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:56:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:56:08,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:56:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:56:08,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 21:56:08,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:56:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:56:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:56:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:56:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:56:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:56:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:56:08,450 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:56:08,587 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:56:08,590 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:56:09,203 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:56:09,203 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:56:09,676 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:56:09,676 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-10-31 21:56:09,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:09 BoogieIcfgContainer [2024-10-31 21:56:09,677 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:56:09,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:56:09,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:56:09,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:56:09,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:56:07" (1/3) ... [2024-10-31 21:56:09,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c81d401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:09, skipping insertion in model container [2024-10-31 21:56:09,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:08" (2/3) ... [2024-10-31 21:56:09,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c81d401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:09, skipping insertion in model container [2024-10-31 21:56:09,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:09" (3/3) ... [2024-10-31 21:56:09,691 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-10-31 21:56:09,712 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:56:09,712 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:56:09,713 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:56:09,784 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 21:56:09,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 50 transitions, 121 flow [2024-10-31 21:56:09,882 INFO L124 PetriNetUnfolderBase]: 11/47 cut-off events. [2024-10-31 21:56:09,882 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:56:09,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 11/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-10-31 21:56:09,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 50 transitions, 121 flow [2024-10-31 21:56:09,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 46 transitions, 110 flow [2024-10-31 21:56:09,904 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:56:09,911 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;@390c5e78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:56:09,912 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-31 21:56:09,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:56:09,933 INFO L124 PetriNetUnfolderBase]: 11/45 cut-off events. [2024-10-31 21:56:09,933 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:56:09,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:09,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:09,934 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:09,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash -643790171, now seen corresponding path program 1 times [2024-10-31 21:56:09,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:09,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439588330] [2024-10-31 21:56:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439588330] [2024-10-31 21:56:10,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439588330] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:10,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:10,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935399480] [2024-10-31 21:56:10,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:10,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:10,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:10,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-31 21:56:10,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-10-31 21:56:10,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:10,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-31 21:56:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:11,536 INFO L124 PetriNetUnfolderBase]: 2373/3340 cut-off events. [2024-10-31 21:56:11,537 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-10-31 21:56:11,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 3340 events. 2373/3340 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15242 event pairs, 1692 based on Foata normal form. 339/2982 useless extension candidates. Maximal degree in co-relation 6310. Up to 3232 conditions per place. [2024-10-31 21:56:11,571 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 38 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2024-10-31 21:56:11,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 198 flow [2024-10-31 21:56:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:56:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-10-31 21:56:11,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.332 [2024-10-31 21:56:11,588 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 110 flow. Second operand 5 states and 83 transitions. [2024-10-31 21:56:11,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 198 flow [2024-10-31 21:56:11,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 186 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:56:11,608 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 110 flow [2024-10-31 21:56:11,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-10-31 21:56:11,616 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-10-31 21:56:11,617 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 110 flow [2024-10-31 21:56:11,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2024-10-31 21:56:11,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:11,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:11,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:56:11,618 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:11,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash 389702561, now seen corresponding path program 1 times [2024-10-31 21:56:11,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:11,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346891207] [2024-10-31 21:56:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:11,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:11,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346891207] [2024-10-31 21:56:11,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346891207] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:11,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549473759] [2024-10-31 21:56:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:11,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:11,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:11,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:56:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:56:12,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:12,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:12,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549473759] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:56:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-10-31 21:56:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868612305] [2024-10-31 21:56:12,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:12,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:56:12,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:56:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:56:12,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-31 21:56:12,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-10-31 21:56:12,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:12,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-31 21:56:12,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:13,013 INFO L124 PetriNetUnfolderBase]: 2677/3766 cut-off events. [2024-10-31 21:56:13,013 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-31 21:56:13,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7496 conditions, 3766 events. 2677/3766 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17544 event pairs, 794 based on Foata normal form. 0/3023 useless extension candidates. Maximal degree in co-relation 7483. Up to 2323 conditions per place. [2024-10-31 21:56:13,047 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 57 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-10-31 21:56:13,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 280 flow [2024-10-31 21:56:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:56:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-10-31 21:56:13,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.392 [2024-10-31 21:56:13,051 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 110 flow. Second operand 5 states and 98 transitions. [2024-10-31 21:56:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 280 flow [2024-10-31 21:56:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 270 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:13,059 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 123 flow [2024-10-31 21:56:13,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-10-31 21:56:13,060 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-31 21:56:13,060 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 123 flow [2024-10-31 21:56:13,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-10-31 21:56:13,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:13,061 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:13,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:56:13,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:13,264 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:13,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1767188247, now seen corresponding path program 1 times [2024-10-31 21:56:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:13,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482357180] [2024-10-31 21:56:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:13,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:56:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482357180] [2024-10-31 21:56:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482357180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441331119] [2024-10-31 21:56:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:13,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:13,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:56:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 21:56:13,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:56:13,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:56:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441331119] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:13,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:13,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-10-31 21:56:13,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222932947] [2024-10-31 21:56:13,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:13,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:56:13,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:56:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:13,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-31 21:56:13,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-31 21:56:13,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:13,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-31 21:56:13,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:14,423 INFO L124 PetriNetUnfolderBase]: 3003/4236 cut-off events. [2024-10-31 21:56:14,423 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-10-31 21:56:14,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9433 conditions, 4236 events. 3003/4236 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20053 event pairs, 881 based on Foata normal form. 0/3555 useless extension candidates. Maximal degree in co-relation 9414. Up to 2470 conditions per place. [2024-10-31 21:56:14,453 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 58 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-31 21:56:14,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 307 flow [2024-10-31 21:56:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-10-31 21:56:14,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-10-31 21:56:14,455 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 123 flow. Second operand 4 states and 88 transitions. [2024-10-31 21:56:14,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 307 flow [2024-10-31 21:56:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:14,460 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 138 flow [2024-10-31 21:56:14,460 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-10-31 21:56:14,461 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-10-31 21:56:14,461 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 138 flow [2024-10-31 21:56:14,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2024-10-31 21:56:14,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:14,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:14,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:14,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:14,663 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:14,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1329234884, now seen corresponding path program 1 times [2024-10-31 21:56:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:14,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394771583] [2024-10-31 21:56:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 21:56:14,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:14,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394771583] [2024-10-31 21:56:14,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394771583] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:14,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:14,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:14,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119452017] [2024-10-31 21:56:14,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:14,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:14,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:14,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-10-31 21:56:14,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-31 21:56:14,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:14,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-10-31 21:56:14,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:15,856 INFO L124 PetriNetUnfolderBase]: 5022/7069 cut-off events. [2024-10-31 21:56:15,858 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-10-31 21:56:15,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17044 conditions, 7069 events. 5022/7069 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35836 event pairs, 1438 based on Foata normal form. 1/6066 useless extension candidates. Maximal degree in co-relation 17024. Up to 4351 conditions per place. [2024-10-31 21:56:15,926 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 68 selfloop transitions, 4 changer transitions 1/77 dead transitions. [2024-10-31 21:56:15,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 380 flow [2024-10-31 21:56:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-10-31 21:56:15,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-31 21:56:15,931 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 138 flow. Second operand 3 states and 90 transitions. [2024-10-31 21:56:15,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 380 flow [2024-10-31 21:56:15,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:15,955 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 160 flow [2024-10-31 21:56:15,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-10-31 21:56:15,958 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-10-31 21:56:15,959 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 160 flow [2024-10-31 21:56:15,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-31 21:56:15,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:15,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:15,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:56:15,960 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:15,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1146571422, now seen corresponding path program 1 times [2024-10-31 21:56:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434049827] [2024-10-31 21:56:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434049827] [2024-10-31 21:56:16,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434049827] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:16,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:16,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 21:56:16,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22719129] [2024-10-31 21:56:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:16,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:56:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:56:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:16,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-31 21:56:16,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-31 21:56:16,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:16,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-31 21:56:16,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:18,296 INFO L124 PetriNetUnfolderBase]: 9996/13941 cut-off events. [2024-10-31 21:56:18,297 INFO L125 PetriNetUnfolderBase]: For 6351/6351 co-relation queries the response was YES. [2024-10-31 21:56:18,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34832 conditions, 13941 events. 9996/13941 cut-off events. For 6351/6351 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 76091 event pairs, 5933 based on Foata normal form. 0/12116 useless extension candidates. Maximal degree in co-relation 34810. Up to 7669 conditions per place. [2024-10-31 21:56:18,391 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 124 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2024-10-31 21:56:18,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 135 transitions, 692 flow [2024-10-31 21:56:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:56:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:56:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-10-31 21:56:18,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-10-31 21:56:18,394 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 160 flow. Second operand 6 states and 153 transitions. [2024-10-31 21:56:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 135 transitions, 692 flow [2024-10-31 21:56:18,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 135 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:18,416 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 226 flow [2024-10-31 21:56:18,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-10-31 21:56:18,419 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-10-31 21:56:18,420 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 226 flow [2024-10-31 21:56:18,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-31 21:56:18,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:18,421 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:18,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:56:18,422 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:18,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1360117292, now seen corresponding path program 1 times [2024-10-31 21:56:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:18,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169552158] [2024-10-31 21:56:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:56:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169552158] [2024-10-31 21:56:18,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169552158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:18,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:18,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 21:56:18,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615668491] [2024-10-31 21:56:18,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:18,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:56:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:56:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:18,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-31 21:56:18,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-31 21:56:18,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:18,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-31 21:56:18,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:20,709 INFO L124 PetriNetUnfolderBase]: 8807/12260 cut-off events. [2024-10-31 21:56:20,709 INFO L125 PetriNetUnfolderBase]: For 11268/11457 co-relation queries the response was YES. [2024-10-31 21:56:20,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33278 conditions, 12260 events. 8807/12260 cut-off events. For 11268/11457 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 64471 event pairs, 5542 based on Foata normal form. 189/10956 useless extension candidates. Maximal degree in co-relation 33251. Up to 7624 conditions per place. [2024-10-31 21:56:20,799 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 108 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2024-10-31 21:56:20,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 686 flow [2024-10-31 21:56:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:56:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:56:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-10-31 21:56:20,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-10-31 21:56:20,803 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 226 flow. Second operand 6 states and 140 transitions. [2024-10-31 21:56:20,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 686 flow [2024-10-31 21:56:20,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 120 transitions, 682 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:20,832 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 279 flow [2024-10-31 21:56:20,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-10-31 21:56:20,836 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-10-31 21:56:20,836 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 279 flow [2024-10-31 21:56:20,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-10-31 21:56:20,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:20,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:20,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 21:56:20,838 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:20,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:20,838 INFO L85 PathProgramCache]: Analyzing trace with hash 292540957, now seen corresponding path program 1 times [2024-10-31 21:56:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74441036] [2024-10-31 21:56:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:21,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74441036] [2024-10-31 21:56:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74441036] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674661329] [2024-10-31 21:56:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:21,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:21,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:56:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:21,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:56:21,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:21,394 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 23 treesize of output 7 [2024-10-31 21:56:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:21,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:21,475 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 25 treesize of output 9 [2024-10-31 21:56:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:21,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674661329] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:21,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-31 21:56:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826218152] [2024-10-31 21:56:21,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:21,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 21:56:21,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 21:56:21,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-31 21:56:21,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-31 21:56:21,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 279 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-31 21:56:21,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:21,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-31 21:56:21,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:24,573 INFO L124 PetriNetUnfolderBase]: 13231/18633 cut-off events. [2024-10-31 21:56:24,573 INFO L125 PetriNetUnfolderBase]: For 19078/19200 co-relation queries the response was YES. [2024-10-31 21:56:24,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53928 conditions, 18633 events. 13231/18633 cut-off events. For 19078/19200 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 106860 event pairs, 7388 based on Foata normal form. 122/16531 useless extension candidates. Maximal degree in co-relation 53897. Up to 7669 conditions per place. [2024-10-31 21:56:24,880 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 136 selfloop transitions, 15 changer transitions 0/155 dead transitions. [2024-10-31 21:56:24,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 155 transitions, 951 flow [2024-10-31 21:56:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:56:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 21:56:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-10-31 21:56:24,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-10-31 21:56:24,884 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 279 flow. Second operand 7 states and 161 transitions. [2024-10-31 21:56:24,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 155 transitions, 951 flow [2024-10-31 21:56:25,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 155 transitions, 946 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:25,158 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 383 flow [2024-10-31 21:56:25,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-10-31 21:56:25,159 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-31 21:56:25,160 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 383 flow [2024-10-31 21:56:25,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-31 21:56:25,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:25,161 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:25,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:56:25,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:25,362 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:25,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1332575869, now seen corresponding path program 1 times [2024-10-31 21:56:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061390098] [2024-10-31 21:56:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:25,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:25,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061390098] [2024-10-31 21:56:25,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061390098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595026264] [2024-10-31 21:56:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:25,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:25,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:25,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:25,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:56:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:25,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:56:25,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:25,946 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 23 treesize of output 7 [2024-10-31 21:56:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:25,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:26,016 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 25 treesize of output 9 [2024-10-31 21:56:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:26,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595026264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:26,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:26,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-31 21:56:26,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409252246] [2024-10-31 21:56:26,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:26,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 21:56:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 21:56:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-31 21:56:26,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 50 [2024-10-31 21:56:26,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 383 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-31 21:56:26,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:26,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 50 [2024-10-31 21:56:26,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:28,242 INFO L124 PetriNetUnfolderBase]: 12016/16800 cut-off events. [2024-10-31 21:56:28,242 INFO L125 PetriNetUnfolderBase]: For 33328/33895 co-relation queries the response was YES. [2024-10-31 21:56:28,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53542 conditions, 16800 events. 12016/16800 cut-off events. For 33328/33895 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 92886 event pairs, 7043 based on Foata normal form. 567/15452 useless extension candidates. Maximal degree in co-relation 53507. Up to 7624 conditions per place. [2024-10-31 21:56:28,361 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 120 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2024-10-31 21:56:28,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 140 transitions, 1003 flow [2024-10-31 21:56:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:56:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 21:56:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-10-31 21:56:28,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-10-31 21:56:28,363 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 383 flow. Second operand 7 states and 148 transitions. [2024-10-31 21:56:28,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 140 transitions, 1003 flow [2024-10-31 21:56:28,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 980 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:28,527 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 452 flow [2024-10-31 21:56:28,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-10-31 21:56:28,528 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-10-31 21:56:28,529 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 452 flow [2024-10-31 21:56:28,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 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) [2024-10-31 21:56:28,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:28,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:28,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:56:28,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 21:56:28,731 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:56:28,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1929539554, now seen corresponding path program 2 times [2024-10-31 21:56:28,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:28,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814189472] [2024-10-31 21:56:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814189472] [2024-10-31 21:56:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814189472] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230691950] [2024-10-31 21:56:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:30,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:30,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:30,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:30,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c654a2ba-51b0-4efc-8e29-9324fb7297eb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:56:30,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:56:30,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:30,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 21:56:30,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:30,894 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 15 treesize of output 7 [2024-10-31 21:56:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 21:56:30,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:31,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 21:56:31,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2024-10-31 21:56:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 21:56:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230691950] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:31,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:31,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-10-31 21:56:31,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501813978] [2024-10-31 21:56:31,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:31,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-31 21:56:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-31 21:56:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2024-10-31 21:56:31,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 50 [2024-10-31 21:56:31,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 452 flow. Second operand has 37 states, 37 states have (on average 7.351351351351352) internal successors, (272), 37 states have internal predecessors, (272), 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) [2024-10-31 21:56:31,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:31,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 50 [2024-10-31 21:56:31,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand