./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.2.4-dev-a340643-m [2024-01-27 15:34:59,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:34:59,231 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:34:59,234 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:34:59,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:34:59,249 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:34:59,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:34:59,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:34:59,249 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:34:59,250 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:34:59,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:34:59,250 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:34:59,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:34:59,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:34:59,251 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:34:59,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:34:59,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:34:59,252 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:34:59,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:34:59,252 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:34:59,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:34:59,253 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:34:59,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:34:59,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:34:59,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:34:59,254 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:34:59,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:34:59,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:34:59,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:34:59,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:34:59,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:34:59,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:34:59,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:34:59,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:34:59,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:34:59,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:34:59,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:34:59,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:34:59,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:34:59,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:34:59,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:34:59,257 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:34:59,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:34:59,257 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-01-27 15:34:59,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:34:59,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:34:59,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:34:59,465 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:34:59,465 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:34:59,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2024-01-27 15:35:00,495 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:35:00,662 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:35:00,663 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2024-01-27 15:35:00,668 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34528ae9/44654ee9f2bb46ce86619795328b7e22/FLAG774cd4352 [2024-01-27 15:35:00,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34528ae9/44654ee9f2bb46ce86619795328b7e22 [2024-01-27 15:35:00,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:35:00,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:35:00,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:35:00,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:35:00,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:35:00,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:35:00" (1/1) ... [2024-01-27 15:35:00,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1718fe38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:00, skipping insertion in model container [2024-01-27 15:35:00,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:35:00" (1/1) ... [2024-01-27 15:35:00,705 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:35:00,937 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-01-27 15:35:00,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:35:00,958 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:35:00,985 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2024-01-27 15:35:00,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:35:01,005 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:35:01,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01 WrapperNode [2024-01-27 15:35:01,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:35:01,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:35:01,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:35:01,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:35:01,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,054 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 290 [2024-01-27 15:35:01,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:35:01,055 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:35:01,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:35:01,055 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:35:01,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,074 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,114 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 2, 2, 2, 11]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 2]. [2024-01-27 15:35:01,115 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,115 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,126 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,139 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:35:01,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:35:01,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:35:01,142 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:35:01,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (1/1) ... [2024-01-27 15:35:01,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:35:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:01,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:35:01,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:35:01,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:35:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:35:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:35:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:35:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:35:01,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:35:01,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:35:01,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:35:01,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:35:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:35:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:35:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:35:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:35:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:35:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:35:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:35:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:35:01,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:35:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:35:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:35:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:35:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:35:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:35:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:35:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:35:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:35:01,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:35:01,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:35:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:35:01,257 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:35:01,383 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:35:01,385 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:35:01,757 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:35:01,757 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:35:02,100 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:35:02,100 INFO L320 CfgBuilder]: Removed 8 assume(true) statements. [2024-01-27 15:35:02,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:35:02 BoogieIcfgContainer [2024-01-27 15:35:02,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:35:02,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:35:02,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:35:02,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:35:02,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:35:00" (1/3) ... [2024-01-27 15:35:02,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bd4061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:35:02, skipping insertion in model container [2024-01-27 15:35:02,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:01" (2/3) ... [2024-01-27 15:35:02,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bd4061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:35:02, skipping insertion in model container [2024-01-27 15:35:02,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:35:02" (3/3) ... [2024-01-27 15:35:02,110 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-01-27 15:35:02,116 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:35:02,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:35:02,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:35:02,124 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:35:02,178 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:35:02,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 52 transitions, 125 flow [2024-01-27 15:35:02,240 INFO L124 PetriNetUnfolderBase]: 11/49 cut-off events. [2024-01-27 15:35:02,240 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:35:02,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 11/49 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. 0/37 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-01-27 15:35:02,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 52 transitions, 125 flow [2024-01-27 15:35:02,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 48 transitions, 114 flow [2024-01-27 15:35:02,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:35:02,261 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35186a7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:35:02,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:35:02,277 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:35:02,277 INFO L124 PetriNetUnfolderBase]: 11/47 cut-off events. [2024-01-27 15:35:02,277 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:35:02,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:02,278 INFO L208 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] [2024-01-27 15:35:02,278 INFO L420 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)] === [2024-01-27 15:35:02,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash -918928211, now seen corresponding path program 1 times [2024-01-27 15:35:02,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:02,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096353552] [2024-01-27 15:35:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:02,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096353552] [2024-01-27 15:35:02,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096353552] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:02,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:02,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:35:02,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543036089] [2024-01-27 15:35:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:02,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:35:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:35:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:35:02,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2024-01-27 15:35:02,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-01-27 15:35:02,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:02,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2024-01-27 15:35:02,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:03,133 INFO L124 PetriNetUnfolderBase]: 4141/5904 cut-off events. [2024-01-27 15:35:03,133 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2024-01-27 15:35:03,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11854 conditions, 5904 events. 4141/5904 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 29957 event pairs, 1127 based on Foata normal form. 623/5272 useless extension candidates. Maximal degree in co-relation 10472. Up to 3653 conditions per place. [2024-01-27 15:35:03,157 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 67 selfloop transitions, 4 changer transitions 1/76 dead transitions. [2024-01-27 15:35:03,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 329 flow [2024-01-27 15:35:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:35:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:35:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-01-27 15:35:03,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-01-27 15:35:03,166 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 114 flow. Second operand 3 states and 100 transitions. [2024-01-27 15:35:03,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 329 flow [2024-01-27 15:35:03,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 307 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:35:03,174 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 122 flow [2024-01-27 15:35:03,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2024-01-27 15:35:03,177 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2024-01-27 15:35:03,178 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 122 flow [2024-01-27 15:35:03,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-01-27 15:35:03,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:03,178 INFO L208 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] [2024-01-27 15:35:03,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:35:03,179 INFO L420 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)] === [2024-01-27 15:35:03,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash 180274219, now seen corresponding path program 1 times [2024-01-27 15:35:03,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:03,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914658851] [2024-01-27 15:35:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:03,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:03,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:03,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914658851] [2024-01-27 15:35:03,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914658851] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:03,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:03,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:35:03,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646124376] [2024-01-27 15:35:03,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:03,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:35:03,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:35:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:35:03,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2024-01-27 15:35:03,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2024-01-27 15:35:03,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:03,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2024-01-27 15:35:03,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:03,808 INFO L124 PetriNetUnfolderBase]: 4142/5899 cut-off events. [2024-01-27 15:35:03,809 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-01-27 15:35:03,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12546 conditions, 5899 events. 4142/5899 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30100 event pairs, 2865 based on Foata normal form. 0/4631 useless extension candidates. Maximal degree in co-relation 4131. Up to 5652 conditions per place. [2024-01-27 15:35:03,831 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 43 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2024-01-27 15:35:03,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 222 flow [2024-01-27 15:35:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:35:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:35:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-01-27 15:35:03,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35096153846153844 [2024-01-27 15:35:03,833 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 122 flow. Second operand 4 states and 73 transitions. [2024-01-27 15:35:03,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 222 flow [2024-01-27 15:35:03,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:03,834 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 132 flow [2024-01-27 15:35:03,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2024-01-27 15:35:03,835 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2024-01-27 15:35:03,835 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 132 flow [2024-01-27 15:35:03,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2024-01-27 15:35:03,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:03,836 INFO L208 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] [2024-01-27 15:35:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:35:03,836 INFO L420 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)] === [2024-01-27 15:35:03,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1175735483, now seen corresponding path program 1 times [2024-01-27 15:35:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:03,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998180947] [2024-01-27 15:35:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:03,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998180947] [2024-01-27 15:35:03,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998180947] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527931282] [2024-01-27 15:35:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:03,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:03,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:03,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:35:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:04,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:35:04,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:04,138 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 [2024-01-27 15:35:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:04,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:35:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527931282] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:35:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2024-01-27 15:35:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227228138] [2024-01-27 15:35:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:35:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:35:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:35:04,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2024-01-27 15:35:04,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2024-01-27 15:35:04,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:04,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2024-01-27 15:35:04,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:05,129 INFO L124 PetriNetUnfolderBase]: 8253/11673 cut-off events. [2024-01-27 15:35:05,130 INFO L125 PetriNetUnfolderBase]: For 750/750 co-relation queries the response was YES. [2024-01-27 15:35:05,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24277 conditions, 11673 events. 8253/11673 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 64768 event pairs, 4657 based on Foata normal form. 0/9322 useless extension candidates. Maximal degree in co-relation 24263. Up to 6390 conditions per place. [2024-01-27 15:35:05,182 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 123 selfloop transitions, 7 changer transitions 0/133 dead transitions. [2024-01-27 15:35:05,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 133 transitions, 598 flow [2024-01-27 15:35:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:35:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:35:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-01-27 15:35:05,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-01-27 15:35:05,184 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 132 flow. Second operand 6 states and 157 transitions. [2024-01-27 15:35:05,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 133 transitions, 598 flow [2024-01-27 15:35:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 133 transitions, 590 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:35:05,188 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 178 flow [2024-01-27 15:35:05,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-01-27 15:35:05,189 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-01-27 15:35:05,189 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 178 flow [2024-01-27 15:35:05,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2024-01-27 15:35:05,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:05,189 INFO L208 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] [2024-01-27 15:35:05,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:05,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:05,421 INFO L420 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)] === [2024-01-27 15:35:05,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1502741770, now seen corresponding path program 1 times [2024-01-27 15:35:05,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:05,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96102365] [2024-01-27 15:35:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96102365] [2024-01-27 15:35:05,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96102365] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044599523] [2024-01-27 15:35:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:05,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:05,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:05,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:05,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:35:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:05,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:35:05,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:05,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044599523] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:05,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:35:05,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-01-27 15:35:05,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835079715] [2024-01-27 15:35:05,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:05,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:35:05,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:35:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:35:05,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2024-01-27 15:35:05,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-01-27 15:35:05,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:05,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2024-01-27 15:35:05,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:06,485 INFO L124 PetriNetUnfolderBase]: 8242/11742 cut-off events. [2024-01-27 15:35:06,485 INFO L125 PetriNetUnfolderBase]: For 2945/3087 co-relation queries the response was YES. [2024-01-27 15:35:06,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27087 conditions, 11742 events. 8242/11742 cut-off events. For 2945/3087 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 64870 event pairs, 2858 based on Foata normal form. 530/10314 useless extension candidates. Maximal degree in co-relation 27065. Up to 6098 conditions per place. [2024-01-27 15:35:06,537 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 68 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-01-27 15:35:06,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 394 flow [2024-01-27 15:35:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:35:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:35:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-01-27 15:35:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-01-27 15:35:06,539 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 178 flow. Second operand 5 states and 100 transitions. [2024-01-27 15:35:06,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 394 flow [2024-01-27 15:35:06,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 390 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:06,554 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 215 flow [2024-01-27 15:35:06,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-01-27 15:35:06,555 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2024-01-27 15:35:06,555 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 215 flow [2024-01-27 15:35:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-01-27 15:35:06,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:06,555 INFO L208 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] [2024-01-27 15:35:06,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:06,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-01-27 15:35:06,767 INFO L420 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)] === [2024-01-27 15:35:06,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1059553159, now seen corresponding path program 1 times [2024-01-27 15:35:06,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:06,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254491022] [2024-01-27 15:35:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:06,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:07,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254491022] [2024-01-27 15:35:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254491022] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484058701] [2024-01-27 15:35:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:07,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:07,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:07,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:07,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:35:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:07,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:35:07,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:07,198 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 [2024-01-27 15:35:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:07,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:07,232 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 [2024-01-27 15:35:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:07,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484058701] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:07,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:07,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:35:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210267764] [2024-01-27 15:35:07,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:07,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:35:07,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:07,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:35:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:35:07,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2024-01-27 15:35:07,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 215 flow. Second operand has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 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) [2024-01-27 15:35:07,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:07,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2024-01-27 15:35:07,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:08,722 INFO L124 PetriNetUnfolderBase]: 13406/18976 cut-off events. [2024-01-27 15:35:08,722 INFO L125 PetriNetUnfolderBase]: For 12415/12415 co-relation queries the response was YES. [2024-01-27 15:35:08,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48157 conditions, 18976 events. 13406/18976 cut-off events. For 12415/12415 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 110728 event pairs, 7280 based on Foata normal form. 0/15892 useless extension candidates. Maximal degree in co-relation 48131. Up to 7110 conditions per place. [2024-01-27 15:35:08,806 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 124 selfloop transitions, 15 changer transitions 0/142 dead transitions. [2024-01-27 15:35:08,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 142 transitions, 729 flow [2024-01-27 15:35:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:35:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:35:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-01-27 15:35:08,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2024-01-27 15:35:08,809 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 215 flow. Second operand 7 states and 165 transitions. [2024-01-27 15:35:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 142 transitions, 729 flow [2024-01-27 15:35:08,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 142 transitions, 718 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:35:08,985 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 314 flow [2024-01-27 15:35:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-01-27 15:35:08,986 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2024-01-27 15:35:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 314 flow [2024-01-27 15:35:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 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) [2024-01-27 15:35:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:08,987 INFO L208 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] [2024-01-27 15:35:09,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:09,202 INFO L420 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)] === [2024-01-27 15:35:09,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -749270169, now seen corresponding path program 2 times [2024-01-27 15:35:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:09,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805003191] [2024-01-27 15:35:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:35:09,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805003191] [2024-01-27 15:35:09,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805003191] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864112416] [2024-01-27 15:35:09,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:09,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:09,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:09,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:35:09,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:09,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:09,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:35:09,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:35:09,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:35:09,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864112416] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:09,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:09,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-01-27 15:35:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482935632] [2024-01-27 15:35:09,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:09,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:35:09,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:35:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:35:09,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2024-01-27 15:35:09,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-01-27 15:35:09,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:09,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2024-01-27 15:35:09,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:10,717 INFO L124 PetriNetUnfolderBase]: 13293/19073 cut-off events. [2024-01-27 15:35:10,717 INFO L125 PetriNetUnfolderBase]: For 29850/30486 co-relation queries the response was YES. [2024-01-27 15:35:10,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51658 conditions, 19073 events. 13293/19073 cut-off events. For 29850/30486 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 114921 event pairs, 4081 based on Foata normal form. 636/16751 useless extension candidates. Maximal degree in co-relation 51628. Up to 10840 conditions per place. [2024-01-27 15:35:10,819 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 85 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2024-01-27 15:35:10,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 677 flow [2024-01-27 15:35:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:35:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:35:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-01-27 15:35:10,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-01-27 15:35:10,820 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 314 flow. Second operand 4 states and 92 transitions. [2024-01-27 15:35:10,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 677 flow [2024-01-27 15:35:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 644 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-01-27 15:35:10,835 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 318 flow [2024-01-27 15:35:10,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-01-27 15:35:10,835 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2024-01-27 15:35:10,836 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 318 flow [2024-01-27 15:35:10,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-01-27 15:35:10,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:10,836 INFO L208 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, 1] [2024-01-27 15:35:10,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:35:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:11,049 INFO L420 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)] === [2024-01-27 15:35:11,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -920894698, now seen corresponding path program 1 times [2024-01-27 15:35:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:11,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256803172] [2024-01-27 15:35:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:11,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256803172] [2024-01-27 15:35:11,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256803172] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:11,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:11,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:35:11,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856556253] [2024-01-27 15:35:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:11,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:35:11,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:35:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:35:11,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2024-01-27 15:35:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2024-01-27 15:35:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:11,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2024-01-27 15:35:11,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:12,703 INFO L124 PetriNetUnfolderBase]: 13763/19251 cut-off events. [2024-01-27 15:35:12,703 INFO L125 PetriNetUnfolderBase]: For 30776/31399 co-relation queries the response was YES. [2024-01-27 15:35:12,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56104 conditions, 19251 events. 13763/19251 cut-off events. For 30776/31399 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 107873 event pairs, 9223 based on Foata normal form. 623/17592 useless extension candidates. Maximal degree in co-relation 56073. Up to 14233 conditions per place. [2024-01-27 15:35:12,790 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 122 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2024-01-27 15:35:12,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 853 flow [2024-01-27 15:35:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:35:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:35:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-27 15:35:12,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-01-27 15:35:12,792 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 318 flow. Second operand 6 states and 148 transitions. [2024-01-27 15:35:12,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 853 flow [2024-01-27 15:35:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:35:12,822 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 369 flow [2024-01-27 15:35:12,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-01-27 15:35:12,823 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2024-01-27 15:35:12,823 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 369 flow [2024-01-27 15:35:12,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2024-01-27 15:35:12,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:12,823 INFO L208 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, 1, 1] [2024-01-27 15:35:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:35:12,823 INFO L420 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)] === [2024-01-27 15:35:12,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 979705758, now seen corresponding path program 1 times [2024-01-27 15:35:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:12,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721506245] [2024-01-27 15:35:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:12,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721506245] [2024-01-27 15:35:12,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721506245] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634911128] [2024-01-27 15:35:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:12,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:12,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:35:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:13,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:35:13,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:13,140 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 [2024-01-27 15:35:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:13,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:13,171 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 [2024-01-27 15:35:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634911128] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:13,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:35:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724610763] [2024-01-27 15:35:13,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:35:13,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:35:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:35:13,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2024-01-27 15:35:13,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 369 flow. Second operand has 15 states, 15 states have (on average 9.066666666666666) internal successors, (136), 15 states have internal predecessors, (136), 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) [2024-01-27 15:35:13,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:13,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2024-01-27 15:35:13,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:14,700 INFO L124 PetriNetUnfolderBase]: 12679/17752 cut-off events. [2024-01-27 15:35:14,700 INFO L125 PetriNetUnfolderBase]: For 31168/31739 co-relation queries the response was YES. [2024-01-27 15:35:14,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54774 conditions, 17752 events. 12679/17752 cut-off events. For 31168/31739 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 98721 event pairs, 7421 based on Foata normal form. 571/16311 useless extension candidates. Maximal degree in co-relation 54739. Up to 8023 conditions per place. [2024-01-27 15:35:14,787 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 128 selfloop transitions, 15 changer transitions 0/148 dead transitions. [2024-01-27 15:35:14,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 148 transitions, 1017 flow [2024-01-27 15:35:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:35:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:35:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-01-27 15:35:14,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 15:35:14,789 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 369 flow. Second operand 7 states and 156 transitions. [2024-01-27 15:35:14,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 148 transitions, 1017 flow [2024-01-27 15:35:14,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 148 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:35:14,890 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 456 flow [2024-01-27 15:35:14,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-01-27 15:35:14,891 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2024-01-27 15:35:14,891 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 456 flow [2024-01-27 15:35:14,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.066666666666666) internal successors, (136), 15 states have internal predecessors, (136), 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) [2024-01-27 15:35:14,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:14,891 INFO L208 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, 1, 1] [2024-01-27 15:35:14,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:15,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:15,103 INFO L420 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)] === [2024-01-27 15:35:15,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1682120188, now seen corresponding path program 1 times [2024-01-27 15:35:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:15,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351465418] [2024-01-27 15:35:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351465418] [2024-01-27 15:35:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351465418] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:15,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240586126] [2024-01-27 15:35:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:15,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:15,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:15,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:35:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:15,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:35:15,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:15,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-27 15:35:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:15,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:35:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:15,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:15,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:35:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:15,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:15,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:35:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:35:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-27 15:35:16,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:35:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:35:16,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:35:16,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:35:16,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:35:16,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:35:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:35:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:35:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:35:16,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:35:16,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:35:16,175 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:35:16,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-27 15:35:16,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-27 15:35:16,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-27 15:35:16,407 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 [2024-01-27 15:35:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:16,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:16,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:16,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2024-01-27 15:35:16,889 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:35:16,889 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 51 treesize of output 42 [2024-01-27 15:35:16,903 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:35:16,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-01-27 15:35:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240586126] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:16,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2024-01-27 15:35:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664390856] [2024-01-27 15:35:16,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:16,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-01-27 15:35:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-01-27 15:35:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1380, Unknown=3, NotChecked=0, Total=1560 [2024-01-27 15:35:17,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 52 [2024-01-27 15:35:17,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 456 flow. Second operand has 40 states, 40 states have (on average 6.3) internal successors, (252), 40 states have internal predecessors, (252), 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) [2024-01-27 15:35:17,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:17,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 52 [2024-01-27 15:35:17,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:29,894 INFO L124 PetriNetUnfolderBase]: 80034/109635 cut-off events. [2024-01-27 15:35:29,894 INFO L125 PetriNetUnfolderBase]: For 161055/161055 co-relation queries the response was YES. [2024-01-27 15:35:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346725 conditions, 109635 events. 80034/109635 cut-off events. For 161055/161055 co-relation queries the response was YES. Maximal size of possible extension queue 2183. Compared 672770 event pairs, 29275 based on Foata normal form. 0/96717 useless extension candidates. Maximal degree in co-relation 269320. Up to 22884 conditions per place. [2024-01-27 15:35:30,738 INFO L140 encePairwiseOnDemand]: 33/52 looper letters, 1067 selfloop transitions, 134 changer transitions 0/1202 dead transitions. [2024-01-27 15:35:30,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 1202 transitions, 7270 flow [2024-01-27 15:35:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-01-27 15:35:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-01-27 15:35:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 1285 transitions. [2024-01-27 15:35:30,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46625544267053703 [2024-01-27 15:35:30,743 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 456 flow. Second operand 53 states and 1285 transitions. [2024-01-27 15:35:30,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 1202 transitions, 7270 flow [2024-01-27 15:35:34,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 1202 transitions, 6946 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-01-27 15:35:34,401 INFO L231 Difference]: Finished difference. Result has 177 places, 207 transitions, 1920 flow [2024-01-27 15:35:34,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=1920, PETRI_PLACES=177, PETRI_TRANSITIONS=207} [2024-01-27 15:35:34,402 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 130 predicate places. [2024-01-27 15:35:34,402 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 207 transitions, 1920 flow [2024-01-27 15:35:34,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.3) internal successors, (252), 40 states have internal predecessors, (252), 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) [2024-01-27 15:35:34,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:34,403 INFO L208 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, 1, 1] [2024-01-27 15:35:34,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:34,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:34,614 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:35:34,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1300293062, now seen corresponding path program 2 times [2024-01-27 15:35:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:34,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644835154] [2024-01-27 15:35:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:35,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:35,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644835154] [2024-01-27 15:35:35,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644835154] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:35,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476162610] [2024-01-27 15:35:35,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:35,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:35,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:35,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:35,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:35:35,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:35,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:35,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:35:35,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:35,579 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 [2024-01-27 15:35:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:35,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:35,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:35,691 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 23 treesize of output 15 [2024-01-27 15:35:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:35,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476162610] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:35,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:35,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 37 [2024-01-27 15:35:35,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052674697] [2024-01-27 15:35:35,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:35,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:35:35,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:35:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:35:35,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2024-01-27 15:35:35,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 207 transitions, 1920 flow. Second operand has 38 states, 38 states have (on average 7.157894736842105) internal successors, (272), 38 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) [2024-01-27 15:35:35,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:35,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2024-01-27 15:35:35,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand