./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:52:44,204 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:52:44,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:52:44,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:52:44,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:52:44,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:52:44,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:52:44,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:52:44,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:52:44,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:52:44,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:52:44,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:52:44,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:52:44,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:52:44,313 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:52:44,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:52:44,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:52:44,314 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:52:44,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:52:44,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:52:44,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:52:44,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:52:44,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:52:44,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:52:44,316 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:52:44,316 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:52:44,316 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:52:44,316 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:52:44,317 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:52:44,317 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:52:44,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:52:44,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:52:44,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:52:44,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:52:44,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:52:44,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:52:44,320 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:52:44,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:52:44,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:52:44,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:52:44,320 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:52:44,321 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:52:44,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:52:44,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:52:44,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:52:44,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:52:44,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:52:44,620 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:52:44,620 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:52:44,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2024-02-19 14:52:45,724 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:52:45,854 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:52:45,854 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2024-02-19 14:52:45,865 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25db8055f/b7efd8af36874446b640164cb247e2bd/FLAG235aa5550 [2024-02-19 14:52:45,881 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25db8055f/b7efd8af36874446b640164cb247e2bd [2024-02-19 14:52:45,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:52:45,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:52:45,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:52:45,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:52:45,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:52:45,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:52:45" (1/1) ... [2024-02-19 14:52:45,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb55657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:45, skipping insertion in model container [2024-02-19 14:52:45,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:52:45" (1/1) ... [2024-02-19 14:52:45,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:52:46,087 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-horseshoe.wvr.c[3424,3437] [2024-02-19 14:52:46,099 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:52:46,109 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:52:46,143 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-horseshoe.wvr.c[3424,3437] [2024-02-19 14:52:46,147 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:52:46,162 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:52:46,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46 WrapperNode [2024-02-19 14:52:46,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:52:46,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:52:46,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:52:46,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:52:46,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,188 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,221 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 254 [2024-02-19 14:52:46,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:52:46,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:52:46,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:52:46,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:52:46,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,245 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,270 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 7, 2, 2, 2]. 47 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, 2, 1, 1, 1]. [2024-02-19 14:52:46,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,283 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:52:46,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:52:46,287 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:52:46,287 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:52:46,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (1/1) ... [2024-02-19 14:52:46,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:52:46,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:46,319 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) [2024-02-19 14:52:46,343 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 [2024-02-19 14:52:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-19 14:52:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:52:46,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:52:46,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:52:46,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:52:46,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-19 14:52:46,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:52:46,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:52:46,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:52:46,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:52:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-19 14:52:46,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-19 14:52:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:52:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:52:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:52:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:52:46,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-19 14:52:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 14:52:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 14:52:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 14:52:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:52:46,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:52:46,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:52:46,386 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:52:46,527 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:52:46,529 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:52:46,894 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:52:46,894 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:52:47,165 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:52:47,165 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-02-19 14:52:47,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:52:47 BoogieIcfgContainer [2024-02-19 14:52:47,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:52:47,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:52:47,167 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:52:47,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:52:47,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:52:45" (1/3) ... [2024-02-19 14:52:47,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bac113d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:52:47, skipping insertion in model container [2024-02-19 14:52:47,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:52:46" (2/3) ... [2024-02-19 14:52:47,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bac113d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:52:47, skipping insertion in model container [2024-02-19 14:52:47,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:52:47" (3/3) ... [2024-02-19 14:52:47,171 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2024-02-19 14:52:47,184 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:52:47,184 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:52:47,184 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:52:47,238 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-19 14:52:47,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2024-02-19 14:52:47,282 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2024-02-19 14:52:47,282 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 14:52:47,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-02-19 14:52:47,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2024-02-19 14:52:47,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2024-02-19 14:52:47,293 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:52:47,298 INFO L369 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=All, 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;@740b243d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:52:47,298 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 14:52:47,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:52:47,307 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-02-19 14:52:47,307 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 14:52:47,307 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:47,308 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:47,308 INFO L432 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)] === [2024-02-19 14:52:47,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1822941260, now seen corresponding path program 1 times [2024-02-19 14:52:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:47,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157479515] [2024-02-19 14:52:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:47,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157479515] [2024-02-19 14:52:47,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157479515] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:52:47,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:52:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:52:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273590036] [2024-02-19 14:52:47,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:52:47,503 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 14:52:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 14:52:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 14:52:47,544 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:52:47,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2024-02-19 14:52:47,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:47,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:52:47,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:47,725 INFO L124 PetriNetUnfolderBase]: 507/983 cut-off events. [2024-02-19 14:52:47,726 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-02-19 14:52:47,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 983 events. 507/983 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5576 event pairs, 376 based on Foata normal form. 153/1008 useless extension candidates. Maximal degree in co-relation 1612. Up to 735 conditions per place. [2024-02-19 14:52:47,736 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 27 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2024-02-19 14:52:47,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 152 flow [2024-02-19 14:52:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 14:52:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 14:52:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2024-02-19 14:52:47,747 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-02-19 14:52:47,750 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-02-19 14:52:47,750 INFO L507 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 152 flow [2024-02-19 14:52:47,750 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2024-02-19 14:52:47,750 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:47,750 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:47,750 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:52:47,751 INFO L432 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)] === [2024-02-19 14:52:47,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash 53960702, now seen corresponding path program 1 times [2024-02-19 14:52:47,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:47,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529097446] [2024-02-19 14:52:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:47,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:47,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:47,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529097446] [2024-02-19 14:52:47,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529097446] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:52:47,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:52:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:52:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244543305] [2024-02-19 14:52:47,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:52:47,895 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:52:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:52:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:52:47,896 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:52:47,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 14:52:47,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:47,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:52:47,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:48,044 INFO L124 PetriNetUnfolderBase]: 431/842 cut-off events. [2024-02-19 14:52:48,044 INFO L125 PetriNetUnfolderBase]: For 185/291 co-relation queries the response was YES. [2024-02-19 14:52:48,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 842 events. 431/842 cut-off events. For 185/291 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4558 event pairs, 103 based on Foata normal form. 12/790 useless extension candidates. Maximal degree in co-relation 1961. Up to 655 conditions per place. [2024-02-19 14:52:48,049 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 34 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-02-19 14:52:48,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 272 flow [2024-02-19 14:52:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:52:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:52:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-02-19 14:52:48,053 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-02-19 14:52:48,054 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-02-19 14:52:48,054 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 272 flow [2024-02-19 14:52:48,054 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 14:52:48,054 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:48,055 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:48,055 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:52:48,056 INFO L432 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)] === [2024-02-19 14:52:48,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash 511651124, now seen corresponding path program 2 times [2024-02-19 14:52:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:48,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306915701] [2024-02-19 14:52:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306915701] [2024-02-19 14:52:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306915701] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:52:48,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:52:48,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:52:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279731094] [2024-02-19 14:52:48,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:52:48,206 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:52:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:52:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:52:48,207 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:52:48,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 14:52:48,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:48,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:52:48,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:48,327 INFO L124 PetriNetUnfolderBase]: 430/895 cut-off events. [2024-02-19 14:52:48,327 INFO L125 PetriNetUnfolderBase]: For 486/574 co-relation queries the response was YES. [2024-02-19 14:52:48,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 895 events. 430/895 cut-off events. For 486/574 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4796 event pairs, 71 based on Foata normal form. 24/853 useless extension candidates. Maximal degree in co-relation 2537. Up to 646 conditions per place. [2024-02-19 14:52:48,331 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 45 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-19 14:52:48,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 432 flow [2024-02-19 14:52:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:52:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:52:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-02-19 14:52:48,334 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-02-19 14:52:48,335 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-02-19 14:52:48,335 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 432 flow [2024-02-19 14:52:48,335 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 14:52:48,336 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:48,336 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:48,336 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:52:48,336 INFO L432 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)] === [2024-02-19 14:52:48,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash 526608470, now seen corresponding path program 3 times [2024-02-19 14:52:48,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471536374] [2024-02-19 14:52:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:48,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:48,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471536374] [2024-02-19 14:52:48,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471536374] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:52:48,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:52:48,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:52:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674054288] [2024-02-19 14:52:48,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:52:48,500 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:52:48,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:52:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:52:48,501 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:52:48,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-02-19 14:52:48,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:48,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:52:48,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:48,619 INFO L124 PetriNetUnfolderBase]: 437/928 cut-off events. [2024-02-19 14:52:48,620 INFO L125 PetriNetUnfolderBase]: For 869/915 co-relation queries the response was YES. [2024-02-19 14:52:48,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 928 events. 437/928 cut-off events. For 869/915 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4982 event pairs, 76 based on Foata normal form. 11/872 useless extension candidates. Maximal degree in co-relation 3100. Up to 669 conditions per place. [2024-02-19 14:52:48,625 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 46 selfloop transitions, 2 changer transitions 12/73 dead transitions. [2024-02-19 14:52:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 665 flow [2024-02-19 14:52:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:52:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:52:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-02-19 14:52:48,627 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-02-19 14:52:48,627 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-02-19 14:52:48,627 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 73 transitions, 665 flow [2024-02-19 14:52:48,628 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-02-19 14:52:48,628 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:48,628 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:48,628 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:52:48,628 INFO L432 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)] === [2024-02-19 14:52:48,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 603343860, now seen corresponding path program 1 times [2024-02-19 14:52:48,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:48,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070437585] [2024-02-19 14:52:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:48,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:52:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070437585] [2024-02-19 14:52:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070437585] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:52:48,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:52:48,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:52:48,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649509206] [2024-02-19 14:52:48,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:52:48,724 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:52:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:52:48,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:52:48,725 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:52:48,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 73 transitions, 665 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2024-02-19 14:52:48,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:48,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:52:48,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:48,867 INFO L124 PetriNetUnfolderBase]: 520/1119 cut-off events. [2024-02-19 14:52:48,867 INFO L125 PetriNetUnfolderBase]: For 1530/1610 co-relation queries the response was YES. [2024-02-19 14:52:48,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5435 conditions, 1119 events. 520/1119 cut-off events. For 1530/1610 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6309 event pairs, 100 based on Foata normal form. 22/1072 useless extension candidates. Maximal degree in co-relation 3663. Up to 833 conditions per place. [2024-02-19 14:52:48,874 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 45 selfloop transitions, 4 changer transitions 42/104 dead transitions. [2024-02-19 14:52:48,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 1184 flow [2024-02-19 14:52:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:52:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:52:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-02-19 14:52:48,875 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-02-19 14:52:48,875 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-02-19 14:52:48,875 INFO L507 AbstractCegarLoop]: Abstraction has has 58 places, 104 transitions, 1184 flow [2024-02-19 14:52:48,876 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2024-02-19 14:52:48,876 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:48,876 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:48,876 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:52:48,876 INFO L432 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)] === [2024-02-19 14:52:48,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:48,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1183497801, now seen corresponding path program 1 times [2024-02-19 14:52:48,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:48,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441134895] [2024-02-19 14:52:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:48,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441134895] [2024-02-19 14:52:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441134895] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469050783] [2024-02-19 14:52:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:50,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:50,077 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) [2024-02-19 14:52:50,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:52:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:50,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 52 conjunts are in the unsatisfiable core [2024-02-19 14:52:50,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:50,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-02-19 14:52:50,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,242 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 [2024-02-19 14:52:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,249 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 [2024-02-19 14:52:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,256 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 [2024-02-19 14:52:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,261 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 [2024-02-19 14:52:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,265 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 [2024-02-19 14:52:50,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,276 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 [2024-02-19 14:52:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,281 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 [2024-02-19 14:52:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,293 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 [2024-02-19 14:52:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,301 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 [2024-02-19 14:52:50,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,309 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 [2024-02-19 14:52:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,315 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 [2024-02-19 14:52:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,321 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 [2024-02-19 14:52:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,342 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 [2024-02-19 14:52:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,350 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 [2024-02-19 14:52:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,355 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 [2024-02-19 14:52:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,361 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 [2024-02-19 14:52:50,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,365 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 [2024-02-19 14:52:50,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,373 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 [2024-02-19 14:52:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,379 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 [2024-02-19 14:52:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,384 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 [2024-02-19 14:52:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,389 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 [2024-02-19 14:52:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,394 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 [2024-02-19 14:52:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-19 14:52:50,398 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 [2024-02-19 14:52:50,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-19 14:52:50,502 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-19 14:52:50,502 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 [2024-02-19 14:52:50,558 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 23 treesize of output 1 [2024-02-19 14:52:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:51,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:52,212 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-02-19 14:52:52,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 367 treesize of output 377 [2024-02-19 14:52:52,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:52:52,237 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 199 treesize of output 197 [2024-02-19 14:52:52,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 30 [2024-02-19 14:52:52,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:52:52,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 172 [2024-02-19 14:52:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:52:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469050783] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:53,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:53,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-02-19 14:52:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775618010] [2024-02-19 14:52:53,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:53,459 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-19 14:52:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-19 14:52:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2024-02-19 14:52:53,679 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-02-19 14:52:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 104 transitions, 1184 flow. Second operand has 37 states, 37 states have (on average 11.297297297297296) internal successors, (418), 37 states have internal predecessors, (418), 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) [2024-02-19 14:52:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-02-19 14:52:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:53:20,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:53:24,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:53:39,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-02-19 14:53:44,238 INFO L124 PetriNetUnfolderBase]: 5197/8605 cut-off events. [2024-02-19 14:53:44,238 INFO L125 PetriNetUnfolderBase]: For 32483/32613 co-relation queries the response was YES. [2024-02-19 14:53:44,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45781 conditions, 8605 events. 5197/8605 cut-off events. For 32483/32613 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 52975 event pairs, 448 based on Foata normal form. 2/8395 useless extension candidates. Maximal degree in co-relation 21305. Up to 5675 conditions per place. [2024-02-19 14:53:44,320 INFO L140 encePairwiseOnDemand]: 30/46 looper letters, 387 selfloop transitions, 104 changer transitions 181/678 dead transitions. [2024-02-19 14:53:44,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 678 transitions, 8989 flow [2024-02-19 14:53:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-02-19 14:53:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-02-19 14:53:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 1011 transitions. [2024-02-19 14:53:44,324 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.399604743083004 [2024-02-19 14:53:44,325 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-02-19 14:53:44,325 INFO L507 AbstractCegarLoop]: Abstraction has has 112 places, 678 transitions, 8989 flow [2024-02-19 14:53:44,325 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.297297297297296) internal successors, (418), 37 states have internal predecessors, (418), 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) [2024-02-19 14:53:44,325 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:53:44,326 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:53:44,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-19 14:53:44,537 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-19 14:53:44,538 INFO L432 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)] === [2024-02-19 14:53:44,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:53:44,542 INFO L85 PathProgramCache]: Analyzing trace with hash 813702865, now seen corresponding path program 2 times [2024-02-19 14:53:44,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:53:44,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323067756] [2024-02-19 14:53:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:53:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:53:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:53:45,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:53:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323067756] [2024-02-19 14:53:45,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323067756] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:53:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693783004] [2024-02-19 14:53:45,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:53:45,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:53:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:53:45,900 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) [2024-02-19 14:53:45,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:53:46,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-19 14:53:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:53:46,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 14:53:46,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:53:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:53:46,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-19 14:53:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693783004] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:53:46,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-19 14:53:46,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2024-02-19 14:53:46,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429745151] [2024-02-19 14:53:46,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:53:46,553 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:53:46,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:53:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:53:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2024-02-19 14:53:46,635 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-19 14:53:46,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 678 transitions, 8989 flow. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 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) [2024-02-19 14:53:46,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:53:46,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-19 14:53:46,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:53:48,377 INFO L124 PetriNetUnfolderBase]: 6221/10409 cut-off events. [2024-02-19 14:53:48,377 INFO L125 PetriNetUnfolderBase]: For 47294/47492 co-relation queries the response was YES. [2024-02-19 14:53:48,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64283 conditions, 10409 events. 6221/10409 cut-off events. For 47294/47492 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 67065 event pairs, 428 based on Foata normal form. 105/10482 useless extension candidates. Maximal degree in co-relation 30552. Up to 6772 conditions per place. [2024-02-19 14:53:48,452 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 632 selfloop transitions, 29 changer transitions 200/875 dead transitions. [2024-02-19 14:53:48,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 875 transitions, 13296 flow [2024-02-19 14:53:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-19 14:53:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-19 14:53:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-02-19 14:53:48,453 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-02-19 14:53:48,454 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-02-19 14:53:48,454 INFO L507 AbstractCegarLoop]: Abstraction has has 119 places, 875 transitions, 13296 flow [2024-02-19 14:53:48,454 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 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) [2024-02-19 14:53:48,455 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:53:48,455 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:53:48,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-19 14:53:48,666 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-19 14:53:48,669 INFO L432 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)] === [2024-02-19 14:53:48,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:53:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1536870775, now seen corresponding path program 1 times [2024-02-19 14:53:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:53:48,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802045420] [2024-02-19 14:53:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:53:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:53:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:53:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:53:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802045420] [2024-02-19 14:53:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802045420] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:53:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530722896] [2024-02-19 14:53:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:53:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:53:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:53:48,796 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) [2024-02-19 14:53:48,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:53:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:48,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 14:53:48,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:53:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:53:48,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:53:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:53:49,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530722896] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:53:49,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:53:49,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-19 14:53:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499906710] [2024-02-19 14:53:49,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:53:49,047 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 14:53:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:53:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 14:53:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:53:49,048 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:53:49,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 875 transitions, 13296 flow. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2024-02-19 14:53:49,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:53:49,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:53:49,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:53:50,669 INFO L124 PetriNetUnfolderBase]: 6353/10797 cut-off events. [2024-02-19 14:53:50,670 INFO L125 PetriNetUnfolderBase]: For 76936/77416 co-relation queries the response was YES. [2024-02-19 14:53:50,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72784 conditions, 10797 events. 6353/10797 cut-off events. For 76936/77416 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 71578 event pairs, 596 based on Foata normal form. 424/11179 useless extension candidates. Maximal degree in co-relation 20581. Up to 6906 conditions per place. [2024-02-19 14:53:50,728 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 476 selfloop transitions, 12 changer transitions 237/797 dead transitions. [2024-02-19 14:53:50,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 797 transitions, 13834 flow [2024-02-19 14:53:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:53:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:53:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-02-19 14:53:50,730 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4980237154150198 [2024-02-19 14:53:50,733 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-02-19 14:53:50,733 INFO L507 AbstractCegarLoop]: Abstraction has has 114 places, 797 transitions, 13834 flow [2024-02-19 14:53:50,733 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2024-02-19 14:53:50,734 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:53:50,734 INFO L234 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, 1, 1, 1] [2024-02-19 14:53:50,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:53:50,947 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:53:50,949 INFO L432 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)] === [2024-02-19 14:53:50,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:53:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash 4386789, now seen corresponding path program 2 times [2024-02-19 14:53:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:53:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652351267] [2024-02-19 14:53:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:53:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:53:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:53:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:53:51,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:53:51,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652351267] [2024-02-19 14:53:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652351267] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:53:51,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245172437] [2024-02-19 14:53:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:53:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:53:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:53:51,436 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) [2024-02-19 14:53:51,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:53:51,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:53:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:53:51,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-19 14:53:51,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:53:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:53:52,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:53:52,684 INFO L349 Elim1Store]: treesize reduction 13, result has 86.0 percent of original size [2024-02-19 14:53:52,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 105 [2024-02-19 14:53:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:53:53,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245172437] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:53:53,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:53:53,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 13] total 30 [2024-02-19 14:53:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934644261] [2024-02-19 14:53:53,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:53:53,168 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-19 14:53:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:53:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-19 14:53:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2024-02-19 14:53:53,283 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-02-19 14:53:53,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 797 transitions, 13834 flow. Second operand has 31 states, 31 states have (on average 12.03225806451613) internal successors, (373), 31 states have internal predecessors, (373), 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) [2024-02-19 14:53:53,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:53:53,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-02-19 14:53:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:54:00,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:04,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:10,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:15,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:21,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:23,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:28,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:32,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:38,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-19 14:54:39,599 INFO L124 PetriNetUnfolderBase]: 22252/35026 cut-off events. [2024-02-19 14:54:39,600 INFO L125 PetriNetUnfolderBase]: For 237175/237351 co-relation queries the response was YES. [2024-02-19 14:54:39,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268031 conditions, 35026 events. 22252/35026 cut-off events. For 237175/237351 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 244074 event pairs, 1006 based on Foata normal form. 651/35644 useless extension candidates. Maximal degree in co-relation 139647. Up to 25561 conditions per place. [2024-02-19 14:54:39,915 INFO L140 encePairwiseOnDemand]: 29/46 looper letters, 1688 selfloop transitions, 353 changer transitions 398/2451 dead transitions. [2024-02-19 14:54:39,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 2451 transitions, 46087 flow [2024-02-19 14:54:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-02-19 14:54:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-02-19 14:54:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1480 transitions. [2024-02-19 14:54:39,921 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.453153704837722 [2024-02-19 14:54:39,921 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-02-19 14:54:39,921 INFO L507 AbstractCegarLoop]: Abstraction has has 184 places, 2451 transitions, 46087 flow [2024-02-19 14:54:39,922 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.03225806451613) internal successors, (373), 31 states have internal predecessors, (373), 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) [2024-02-19 14:54:39,922 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:54:39,922 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-02-19 14:54:39,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-19 14:54:40,129 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:54:40,131 INFO L432 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)] === [2024-02-19 14:54:40,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:54:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1587542007, now seen corresponding path program 1 times [2024-02-19 14:54:40,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:54:40,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251021167] [2024-02-19 14:54:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:54:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:54:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:54:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:54:40,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:54:40,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251021167] [2024-02-19 14:54:40,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251021167] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:54:40,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636665174] [2024-02-19 14:54:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:54:40,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:54:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:54:40,265 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) [2024-02-19 14:54:40,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:54:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:54:40,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 14:54:40,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:54:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:54:40,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-19 14:54:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636665174] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:54:40,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-19 14:54:40,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-02-19 14:54:40,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571411708] [2024-02-19 14:54:40,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:54:40,448 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:54:40,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:54:40,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:54:40,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-19 14:54:40,449 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 14:54:40,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 2451 transitions, 46087 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2024-02-19 14:54:40,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:54:40,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 14:54:40,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:54:55,124 INFO L124 PetriNetUnfolderBase]: 32506/50718 cut-off events. [2024-02-19 14:54:55,125 INFO L125 PetriNetUnfolderBase]: For 462903/463101 co-relation queries the response was YES. [2024-02-19 14:54:55,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417305 conditions, 50718 events. 32506/50718 cut-off events. For 462903/463101 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 363861 event pairs, 1764 based on Foata normal form. 758/51443 useless extension candidates. Maximal degree in co-relation 266946. Up to 39518 conditions per place. [2024-02-19 14:54:55,611 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 1772 selfloop transitions, 86 changer transitions 1007/3118 dead transitions. [2024-02-19 14:54:55,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 3118 transitions, 65354 flow [2024-02-19 14:54:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:54:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:54:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-19 14:54:55,613 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-02-19 14:54:55,613 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-02-19 14:54:55,613 INFO L507 AbstractCegarLoop]: Abstraction has has 185 places, 3118 transitions, 65354 flow [2024-02-19 14:54:55,614 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2024-02-19 14:54:55,614 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:54:55,614 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1] [2024-02-19 14:54:55,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-19 14:54:55,824 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-19 14:54:55,826 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 14:54:55,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:54:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -191684513, now seen corresponding path program 3 times [2024-02-19 14:54:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:54:55,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105145116] [2024-02-19 14:54:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:54:55,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:54:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:54:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:54:56,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:54:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105145116] [2024-02-19 14:54:56,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105145116] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:54:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086552067] [2024-02-19 14:54:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:54:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:54:56,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:54:56,492 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) [2024-02-19 14:54:56,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:54:56,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:54:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:54:56,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2024-02-19 14:54:56,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:54:56,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-19 14:54:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:54:57,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:54:57,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:54:57,878 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 197 treesize of output 191 [2024-02-19 14:54:57,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:54:57,946 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 163 treesize of output 135 [2024-02-19 14:54:58,129 INFO L349 Elim1Store]: treesize reduction 5, result has 93.8 percent of original size [2024-02-19 14:54:58,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 346 treesize of output 337 [2024-02-19 14:54:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 14:54:58,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086552067] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:54:58,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:54:58,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 28 [2024-02-19 14:54:58,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512982523] [2024-02-19 14:54:58,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:54:58,890 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:54:58,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:54:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:54:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:54:58,999 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-19 14:54:58,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 3118 transitions, 65354 flow. Second operand has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 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) [2024-02-19 14:54:58,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:54:58,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-19 14:54:58,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:55:54,195 INFO L124 PetriNetUnfolderBase]: 76877/119550 cut-off events. [2024-02-19 14:55:54,196 INFO L125 PetriNetUnfolderBase]: For 1296033/1296313 co-relation queries the response was YES. [2024-02-19 14:55:54,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082930 conditions, 119550 events. 76877/119550 cut-off events. For 1296033/1296313 co-relation queries the response was YES. Maximal size of possible extension queue 3528. Compared 974284 event pairs, 3247 based on Foata normal form. 407/119919 useless extension candidates. Maximal degree in co-relation 542545. Up to 99506 conditions per place. [2024-02-19 14:55:55,681 INFO L140 encePairwiseOnDemand]: 30/46 looper letters, 5581 selfloop transitions, 1581 changer transitions 1441/8627 dead transitions. [2024-02-19 14:55:55,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 8627 transitions, 196230 flow [2024-02-19 14:55:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-02-19 14:55:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-02-19 14:55:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 1581 transitions. [2024-02-19 14:55:55,708 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45223112128146453 [2024-02-19 14:55:55,709 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 215 predicate places. [2024-02-19 14:55:55,709 INFO L507 AbstractCegarLoop]: Abstraction has has 260 places, 8627 transitions, 196230 flow [2024-02-19 14:55:55,710 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 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) [2024-02-19 14:55:55,711 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:55:55,711 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2024-02-19 14:55:55,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 14:55:55,921 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:55:55,922 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 14:55:55,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:55:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1384395472, now seen corresponding path program 4 times [2024-02-19 14:55:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:55:55,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267836232] [2024-02-19 14:55:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:55:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:55:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:55:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:55:56,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:55:56,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267836232] [2024-02-19 14:55:56,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267836232] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:55:56,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662178271] [2024-02-19 14:55:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:55:56,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:55:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:55:56,665 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) [2024-02-19 14:55:56,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 14:55:56,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:55:56,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:55:56,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:55:56,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:55:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-02-19 14:55:56,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:55:57,028 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 14:55:57,029 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 24 treesize of output 11 [2024-02-19 14:55:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-02-19 14:55:57,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662178271] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:55:57,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:55:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 15 [2024-02-19 14:55:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089848380] [2024-02-19 14:55:57,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:55:57,133 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-19 14:55:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:55:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-19 14:55:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-02-19 14:55:57,193 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-02-19 14:55:57,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 8627 transitions, 196230 flow. Second operand has 16 states, 16 states have (on average 17.8125) internal successors, (285), 16 states have internal predecessors, (285), 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) [2024-02-19 14:55:57,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:55:57,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-02-19 14:55:57,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand