./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:07:07,469 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:07:07,563 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:07:07,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:07:07,572 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:07:07,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:07:07,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:07:07,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:07:07,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:07:07,613 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:07:07,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:07:07,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:07:07,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:07:07,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:07:07,616 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:07:07,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:07:07,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:07:07,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:07:07,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:07:07,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:07:07,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:07:07,620 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:07:07,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:07:07,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:07:07,621 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:07:07,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:07:07,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:07:07,622 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:07:07,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:07:07,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:07:07,624 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:07:07,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:07:07,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:07:07,625 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:07:07,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:07:07,626 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:07:07,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:07:07,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:07:07,627 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:07:07,627 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:07:07,627 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:07:07,628 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:07:07,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:07:07,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:07:07,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:07:07,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:07:07,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:07:07,965 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:07:07,966 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:07:07,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-02-20 12:07:09,257 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:07:09,525 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:07:09,525 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-02-20 12:07:09,539 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4cdbae0f/688b2b7aec194d9fba1dbbd755f9b925/FLAGe7e968ed9 [2024-02-20 12:07:09,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4cdbae0f/688b2b7aec194d9fba1dbbd755f9b925 [2024-02-20 12:07:09,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:07:09,561 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:07:09,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:07:09,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:07:09,571 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:07:09,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:09,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09, skipping insertion in model container [2024-02-20 12:07:09,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:09,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:07:09,818 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2024-02-20 12:07:09,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:07:09,856 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:07:09,895 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2024-02-20 12:07:09,900 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:07:09,923 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:07:09,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09 WrapperNode [2024-02-20 12:07:09,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:07:09,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:07:09,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:07:09,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:07:09,934 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:09,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,036 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2024-02-20 12:07:10,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:07:10,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:07:10,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:07:10,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:07:10,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,050 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,081 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-20 12:07:10,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:07:10,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:07:10,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:07:10,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:07:10,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (1/1) ... [2024-02-20 12:07:10,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:07:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:10,179 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) [2024-02-20 12:07:10,204 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 [2024-02-20 12:07:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:07:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:07:10,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:07:10,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:07:10,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:07:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:07:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:07:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:07:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:07:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:07:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:07:10,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:07:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:07:10,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:07:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:07:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:07:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:07:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:07:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:07:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:07:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 12:07:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:07:10,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:07:10,279 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:07:10,386 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:07:10,389 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:07:10,632 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:07:10,633 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:07:10,777 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:07:10,777 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-20 12:07:10,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:07:10 BoogieIcfgContainer [2024-02-20 12:07:10,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:07:10,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:07:10,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:07:10,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:07:10,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:07:09" (1/3) ... [2024-02-20 12:07:10,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543bf34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:07:10, skipping insertion in model container [2024-02-20 12:07:10,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:07:09" (2/3) ... [2024-02-20 12:07:10,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543bf34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:07:10, skipping insertion in model container [2024-02-20 12:07:10,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:07:10" (3/3) ... [2024-02-20 12:07:10,784 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-02-20 12:07:10,799 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:07:10,799 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:07:10,800 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:07:10,847 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:07:10,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 64 flow [2024-02-20 12:07:10,912 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-02-20 12:07:10,914 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:07:10,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 3/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-20 12:07:10,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 64 flow [2024-02-20 12:07:10,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 56 flow [2024-02-20 12:07:10,935 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:07:10,943 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;@5f25f38b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:07:10,943 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 12:07:10,954 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:07:10,955 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2024-02-20 12:07:10,955 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:07:10,955 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:10,956 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:10,956 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:10,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash 135091543, now seen corresponding path program 1 times [2024-02-20 12:07:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:10,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719606080] [2024-02-20 12:07:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719606080] [2024-02-20 12:07:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719606080] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:07:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:07:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:07:11,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889025724] [2024-02-20 12:07:11,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:07:11,278 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:07:11,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:07:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:07:11,376 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-02-20 12:07:11,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-02-20 12:07:11,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:11,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-02-20 12:07:11,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:11,483 INFO L124 PetriNetUnfolderBase]: 95/184 cut-off events. [2024-02-20 12:07:11,483 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-20 12:07:11,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 184 events. 95/184 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 643 event pairs, 13 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 285. Up to 132 conditions per place. [2024-02-20 12:07:11,489 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 23 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2024-02-20 12:07:11,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 139 flow [2024-02-20 12:07:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:07:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:07:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-02-20 12:07:11,501 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-02-20 12:07:11,504 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2024-02-20 12:07:11,505 INFO L507 AbstractCegarLoop]: Abstraction has has 28 places, 32 transitions, 139 flow [2024-02-20 12:07:11,505 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-02-20 12:07:11,505 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:11,505 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:11,505 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:07:11,506 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:11,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash -891408889, now seen corresponding path program 1 times [2024-02-20 12:07:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:11,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858360157] [2024-02-20 12:07:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:11,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858360157] [2024-02-20 12:07:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858360157] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:07:11,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:07:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 12:07:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572910262] [2024-02-20 12:07:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:07:11,721 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:07:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:11,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:07:11,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:07:11,730 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:11,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 32 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:11,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:11,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:11,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:11,874 INFO L124 PetriNetUnfolderBase]: 171/341 cut-off events. [2024-02-20 12:07:11,875 INFO L125 PetriNetUnfolderBase]: For 100/118 co-relation queries the response was YES. [2024-02-20 12:07:11,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 341 events. 171/341 cut-off events. For 100/118 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1459 event pairs, 38 based on Foata normal form. 12/344 useless extension candidates. Maximal degree in co-relation 531. Up to 209 conditions per place. [2024-02-20 12:07:11,880 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 50 selfloop transitions, 6 changer transitions 4/63 dead transitions. [2024-02-20 12:07:11,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 63 transitions, 402 flow [2024-02-20 12:07:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:07:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:07:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-02-20 12:07:11,883 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.528 [2024-02-20 12:07:11,884 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2024-02-20 12:07:11,885 INFO L507 AbstractCegarLoop]: Abstraction has has 32 places, 63 transitions, 402 flow [2024-02-20 12:07:11,885 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:11,885 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:11,885 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:11,885 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:07:11,886 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:11,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -600951372, now seen corresponding path program 1 times [2024-02-20 12:07:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:11,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762940026] [2024-02-20 12:07:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:11,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:12,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:12,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762940026] [2024-02-20 12:07:12,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762940026] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:07:12,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:07:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 12:07:12,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080024551] [2024-02-20 12:07:12,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:07:12,041 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:07:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:07:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:07:12,050 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:12,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 63 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:12,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:12,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:12,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:12,121 INFO L124 PetriNetUnfolderBase]: 165/315 cut-off events. [2024-02-20 12:07:12,122 INFO L125 PetriNetUnfolderBase]: For 291/295 co-relation queries the response was YES. [2024-02-20 12:07:12,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 315 events. 165/315 cut-off events. For 291/295 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1222 event pairs, 58 based on Foata normal form. 7/316 useless extension candidates. Maximal degree in co-relation 764. Up to 230 conditions per place. [2024-02-20 12:07:12,125 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 2 changer transitions 22/54 dead transitions. [2024-02-20 12:07:12,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 441 flow [2024-02-20 12:07:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:07:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:07:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-02-20 12:07:12,126 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.488 [2024-02-20 12:07:12,127 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2024-02-20 12:07:12,127 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 54 transitions, 441 flow [2024-02-20 12:07:12,127 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:12,127 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:12,128 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:12,128 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:07:12,128 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:12,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash -962150160, now seen corresponding path program 1 times [2024-02-20 12:07:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011202750] [2024-02-20 12:07:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:12,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:12,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011202750] [2024-02-20 12:07:12,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011202750] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:12,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608156831] [2024-02-20 12:07:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:12,214 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) [2024-02-20 12:07:12,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:07:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:12,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:07:12,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:12,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:12,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608156831] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:12,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 12:07:12,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-02-20 12:07:12,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729783930] [2024-02-20 12:07:12,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:07:12,387 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:07:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:12,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:07:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-02-20 12:07:12,393 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:12,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 54 transitions, 441 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:12,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:12,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:12,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:12,466 INFO L124 PetriNetUnfolderBase]: 159/295 cut-off events. [2024-02-20 12:07:12,466 INFO L125 PetriNetUnfolderBase]: For 475/559 co-relation queries the response was YES. [2024-02-20 12:07:12,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1334 conditions, 295 events. 159/295 cut-off events. For 475/559 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1089 event pairs, 31 based on Foata normal form. 29/316 useless extension candidates. Maximal degree in co-relation 943. Up to 216 conditions per place. [2024-02-20 12:07:12,469 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 33 selfloop transitions, 5 changer transitions 21/62 dead transitions. [2024-02-20 12:07:12,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 617 flow [2024-02-20 12:07:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:07:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:07:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-02-20 12:07:12,470 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-02-20 12:07:12,471 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 14 predicate places. [2024-02-20 12:07:12,471 INFO L507 AbstractCegarLoop]: Abstraction has has 40 places, 62 transitions, 617 flow [2024-02-20 12:07:12,471 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:12,471 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:12,472 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:12,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-20 12:07:12,684 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:12,685 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:12,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash -814038579, now seen corresponding path program 1 times [2024-02-20 12:07:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:12,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143534490] [2024-02-20 12:07:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143534490] [2024-02-20 12:07:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143534490] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203346327] [2024-02-20 12:07:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:12,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:12,881 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) [2024-02-20 12:07:12,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:07:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:12,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:07:12,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:13,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:13,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203346327] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:13,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 12:07:13,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-02-20 12:07:13,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222382861] [2024-02-20 12:07:13,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:07:13,042 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:07:13,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:13,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:07:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-02-20 12:07:13,049 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:13,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 62 transitions, 617 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:13,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:13,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:13,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:13,165 INFO L124 PetriNetUnfolderBase]: 165/305 cut-off events. [2024-02-20 12:07:13,165 INFO L125 PetriNetUnfolderBase]: For 649/725 co-relation queries the response was YES. [2024-02-20 12:07:13,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 305 events. 165/305 cut-off events. For 649/725 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1078 event pairs, 26 based on Foata normal form. 23/323 useless extension candidates. Maximal degree in co-relation 1142. Up to 219 conditions per place. [2024-02-20 12:07:13,169 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 40 selfloop transitions, 6 changer transitions 21/71 dead transitions. [2024-02-20 12:07:13,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 71 transitions, 836 flow [2024-02-20 12:07:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:07:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:07:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-02-20 12:07:13,170 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-02-20 12:07:13,171 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-02-20 12:07:13,171 INFO L507 AbstractCegarLoop]: Abstraction has has 44 places, 71 transitions, 836 flow [2024-02-20 12:07:13,172 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-02-20 12:07:13,172 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:13,172 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] [2024-02-20 12:07:13,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:13,388 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:13,388 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:13,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:13,389 INFO L85 PathProgramCache]: Analyzing trace with hash 848203336, now seen corresponding path program 1 times [2024-02-20 12:07:13,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:13,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703232713] [2024-02-20 12:07:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:13,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:13,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703232713] [2024-02-20 12:07:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703232713] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243736222] [2024-02-20 12:07:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:13,897 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) [2024-02-20 12:07:13,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:07:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:14,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-20 12:07:14,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:14,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:14,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:14,169 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 17 treesize of output 14 [2024-02-20 12:07:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:14,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243736222] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:14,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:14,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-02-20 12:07:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639350844] [2024-02-20 12:07:14,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:14,194 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:07:14,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:14,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:07:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:07:14,234 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:14,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 71 transitions, 836 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 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) [2024-02-20 12:07:14,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:14,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:14,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:14,521 INFO L124 PetriNetUnfolderBase]: 269/489 cut-off events. [2024-02-20 12:07:14,522 INFO L125 PetriNetUnfolderBase]: For 1399/1451 co-relation queries the response was YES. [2024-02-20 12:07:14,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3025 conditions, 489 events. 269/489 cut-off events. For 1399/1451 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1935 event pairs, 21 based on Foata normal form. 1/484 useless extension candidates. Maximal degree in co-relation 2299. Up to 390 conditions per place. [2024-02-20 12:07:14,529 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 77 selfloop transitions, 32 changer transitions 24/138 dead transitions. [2024-02-20 12:07:14,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 138 transitions, 1885 flow [2024-02-20 12:07:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 12:07:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 12:07:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-02-20 12:07:14,531 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-02-20 12:07:14,531 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2024-02-20 12:07:14,532 INFO L507 AbstractCegarLoop]: Abstraction has has 55 places, 138 transitions, 1885 flow [2024-02-20 12:07:14,532 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 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) [2024-02-20 12:07:14,532 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:14,532 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] [2024-02-20 12:07:14,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:14,749 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:14,750 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:14,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash 583757960, now seen corresponding path program 2 times [2024-02-20 12:07:14,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:14,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116988923] [2024-02-20 12:07:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:14,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:15,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116988923] [2024-02-20 12:07:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116988923] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039873420] [2024-02-20 12:07:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:07:15,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:15,193 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) [2024-02-20 12:07:15,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:07:15,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:07:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:15,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 12:07:15,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:15,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:15,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:15,419 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 21 treesize of output 14 [2024-02-20 12:07:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039873420] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:15,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 14 [2024-02-20 12:07:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085706784] [2024-02-20 12:07:15,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:15,467 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:07:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:07:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:07:15,513 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:15,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 138 transitions, 1885 flow. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 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) [2024-02-20 12:07:15,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:15,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:15,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:15,809 INFO L124 PetriNetUnfolderBase]: 349/622 cut-off events. [2024-02-20 12:07:15,809 INFO L125 PetriNetUnfolderBase]: For 2979/3095 co-relation queries the response was YES. [2024-02-20 12:07:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4411 conditions, 622 events. 349/622 cut-off events. For 2979/3095 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2606 event pairs, 24 based on Foata normal form. 3/619 useless extension candidates. Maximal degree in co-relation 3573. Up to 510 conditions per place. [2024-02-20 12:07:15,818 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 123 selfloop transitions, 28 changer transitions 25/181 dead transitions. [2024-02-20 12:07:15,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 181 transitions, 2851 flow [2024-02-20 12:07:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 12:07:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 12:07:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-02-20 12:07:15,819 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.464 [2024-02-20 12:07:15,821 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2024-02-20 12:07:15,821 INFO L507 AbstractCegarLoop]: Abstraction has has 64 places, 181 transitions, 2851 flow [2024-02-20 12:07:15,822 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 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) [2024-02-20 12:07:15,822 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:15,822 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] [2024-02-20 12:07:15,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:16,038 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:16,039 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:16,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1853351054, now seen corresponding path program 3 times [2024-02-20 12:07:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:16,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125761441] [2024-02-20 12:07:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:16,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:16,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:16,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125761441] [2024-02-20 12:07:16,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125761441] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:16,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844904183] [2024-02-20 12:07:16,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:07:16,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:16,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:16,447 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) [2024-02-20 12:07:16,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:07:16,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 12:07:16,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:16,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 12:07:16,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:16,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:16,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:16,636 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 17 treesize of output 14 [2024-02-20 12:07:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844904183] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:16,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:16,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-02-20 12:07:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999386718] [2024-02-20 12:07:16,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:16,667 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:07:16,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:07:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:07:16,699 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:16,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 181 transitions, 2851 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 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) [2024-02-20 12:07:16,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:16,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:16,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:17,015 INFO L124 PetriNetUnfolderBase]: 433/773 cut-off events. [2024-02-20 12:07:17,016 INFO L125 PetriNetUnfolderBase]: For 4458/4530 co-relation queries the response was YES. [2024-02-20 12:07:17,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 773 events. 433/773 cut-off events. For 4458/4530 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3422 event pairs, 27 based on Foata normal form. 1/768 useless extension candidates. Maximal degree in co-relation 5145. Up to 644 conditions per place. [2024-02-20 12:07:17,027 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 152 selfloop transitions, 49 changer transitions 26/232 dead transitions. [2024-02-20 12:07:17,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 232 transitions, 4121 flow [2024-02-20 12:07:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 12:07:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 12:07:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-02-20 12:07:17,028 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2024-02-20 12:07:17,029 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2024-02-20 12:07:17,029 INFO L507 AbstractCegarLoop]: Abstraction has has 75 places, 232 transitions, 4121 flow [2024-02-20 12:07:17,029 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 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) [2024-02-20 12:07:17,029 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:17,030 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] [2024-02-20 12:07:17,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-20 12:07:17,243 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:17,243 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:17,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:17,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1072763415, now seen corresponding path program 4 times [2024-02-20 12:07:17,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:17,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099906555] [2024-02-20 12:07:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:17,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:17,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:17,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099906555] [2024-02-20 12:07:17,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099906555] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:17,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704634941] [2024-02-20 12:07:17,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:07:17,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:17,361 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) [2024-02-20 12:07:17,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:07:17,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:07:17,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:17,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:07:17,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:17,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:17,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704634941] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:17,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:17,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-02-20 12:07:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908572683] [2024-02-20 12:07:17,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:17,555 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:07:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:07:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:07:17,565 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:07:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 232 transitions, 4121 flow. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:07:17,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:17,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:07:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:18,042 INFO L124 PetriNetUnfolderBase]: 842/1488 cut-off events. [2024-02-20 12:07:18,042 INFO L125 PetriNetUnfolderBase]: For 7388/7388 co-relation queries the response was YES. [2024-02-20 12:07:18,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 1488 events. 842/1488 cut-off events. For 7388/7388 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7374 event pairs, 53 based on Foata normal form. 50/1535 useless extension candidates. Maximal degree in co-relation 6986. Up to 1251 conditions per place. [2024-02-20 12:07:18,065 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 342 selfloop transitions, 99 changer transitions 79/521 dead transitions. [2024-02-20 12:07:18,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 521 transitions, 10153 flow [2024-02-20 12:07:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 12:07:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 12:07:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 168 transitions. [2024-02-20 12:07:18,068 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-02-20 12:07:18,068 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2024-02-20 12:07:18,068 INFO L507 AbstractCegarLoop]: Abstraction has has 90 places, 521 transitions, 10153 flow [2024-02-20 12:07:18,069 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:07:18,069 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:18,069 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] [2024-02-20 12:07:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:18,285 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:18,285 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:18,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1550890760, now seen corresponding path program 5 times [2024-02-20 12:07:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740596920] [2024-02-20 12:07:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:18,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740596920] [2024-02-20 12:07:18,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740596920] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671534263] [2024-02-20 12:07:18,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:07:18,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:18,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:18,380 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) [2024-02-20 12:07:18,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:07:18,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:07:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:18,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:07:18,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:18,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671534263] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-02-20 12:07:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375066554] [2024-02-20 12:07:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:18,580 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:07:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:07:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:07:18,611 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:18,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 521 transitions, 10153 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 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) [2024-02-20 12:07:18,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:18,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:18,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:19,039 INFO L124 PetriNetUnfolderBase]: 713/1306 cut-off events. [2024-02-20 12:07:19,039 INFO L125 PetriNetUnfolderBase]: For 7715/7715 co-relation queries the response was YES. [2024-02-20 12:07:19,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12689 conditions, 1306 events. 713/1306 cut-off events. For 7715/7715 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6451 event pairs, 55 based on Foata normal form. 26/1329 useless extension candidates. Maximal degree in co-relation 8164. Up to 1097 conditions per place. [2024-02-20 12:07:19,055 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 249 selfloop transitions, 3 changer transitions 209/476 dead transitions. [2024-02-20 12:07:19,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 476 transitions, 10230 flow [2024-02-20 12:07:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 12:07:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 12:07:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-02-20 12:07:19,056 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-02-20 12:07:19,057 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 70 predicate places. [2024-02-20 12:07:19,057 INFO L507 AbstractCegarLoop]: Abstraction has has 96 places, 476 transitions, 10230 flow [2024-02-20 12:07:19,057 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 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) [2024-02-20 12:07:19,057 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:19,057 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:19,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:19,275 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:19,275 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:19,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1409372678, now seen corresponding path program 6 times [2024-02-20 12:07:19,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:19,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721755026] [2024-02-20 12:07:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:19,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-20 12:07:19,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:19,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721755026] [2024-02-20 12:07:19,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721755026] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:19,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680166719] [2024-02-20 12:07:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:07:19,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:19,409 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:19,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:07:19,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:07:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:19,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:07:19,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:19,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680166719] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:19,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-20 12:07:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929226010] [2024-02-20 12:07:19,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:19,597 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:07:19,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:07:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:07:19,606 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:07:19,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 476 transitions, 10230 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:07:19,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:19,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:07:19,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:20,385 INFO L124 PetriNetUnfolderBase]: 760/1386 cut-off events. [2024-02-20 12:07:20,385 INFO L125 PetriNetUnfolderBase]: For 8649/8649 co-relation queries the response was YES. [2024-02-20 12:07:20,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14846 conditions, 1386 events. 760/1386 cut-off events. For 8649/8649 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6617 event pairs, 19 based on Foata normal form. 56/1439 useless extension candidates. Maximal degree in co-relation 9918. Up to 1173 conditions per place. [2024-02-20 12:07:20,406 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 250 selfloop transitions, 88 changer transitions 216/555 dead transitions. [2024-02-20 12:07:20,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 555 transitions, 12819 flow [2024-02-20 12:07:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 12:07:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 12:07:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 214 transitions. [2024-02-20 12:07:20,408 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3890909090909091 [2024-02-20 12:07:20,408 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 91 predicate places. [2024-02-20 12:07:20,408 INFO L507 AbstractCegarLoop]: Abstraction has has 117 places, 555 transitions, 12819 flow [2024-02-20 12:07:20,409 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:07:20,409 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:20,409 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:20,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:20,625 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-02-20 12:07:20,626 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:20,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash 696218825, now seen corresponding path program 7 times [2024-02-20 12:07:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202914823] [2024-02-20 12:07:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:20,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202914823] [2024-02-20 12:07:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202914823] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999093144] [2024-02-20 12:07:20,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:07:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:20,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:20,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:07:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:20,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:07:20,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:20,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:20,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999093144] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:20,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:20,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-02-20 12:07:20,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698944390] [2024-02-20 12:07:20,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:20,994 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:07:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:20,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:07:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:07:21,016 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:21,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 555 transitions, 12819 flow. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 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) [2024-02-20 12:07:21,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:21,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:21,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:21,510 INFO L124 PetriNetUnfolderBase]: 665/1202 cut-off events. [2024-02-20 12:07:21,510 INFO L125 PetriNetUnfolderBase]: For 9985/9985 co-relation queries the response was YES. [2024-02-20 12:07:21,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13863 conditions, 1202 events. 665/1202 cut-off events. For 9985/9985 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5435 event pairs, 17 based on Foata normal form. 36/1235 useless extension candidates. Maximal degree in co-relation 8641. Up to 998 conditions per place. [2024-02-20 12:07:21,527 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 212 selfloop transitions, 39 changer transitions 213/484 dead transitions. [2024-02-20 12:07:21,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 484 transitions, 12033 flow [2024-02-20 12:07:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 12:07:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 12:07:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-02-20 12:07:21,529 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.476 [2024-02-20 12:07:21,529 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 100 predicate places. [2024-02-20 12:07:21,529 INFO L507 AbstractCegarLoop]: Abstraction has has 126 places, 484 transitions, 12033 flow [2024-02-20 12:07:21,529 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 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) [2024-02-20 12:07:21,529 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:21,530 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:21,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:21,744 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:21,744 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:21,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1843712495, now seen corresponding path program 8 times [2024-02-20 12:07:21,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:21,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811047317] [2024-02-20 12:07:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:21,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:22,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:22,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811047317] [2024-02-20 12:07:22,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811047317] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651303632] [2024-02-20 12:07:22,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:07:22,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:22,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:22,550 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:22,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:07:22,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:07:22,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:22,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:07:22,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:22,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:23,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:23,029 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 35 treesize of output 43 [2024-02-20 12:07:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:23,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651303632] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:23,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:23,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 29 [2024-02-20 12:07:23,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3673984] [2024-02-20 12:07:23,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:23,114 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 12:07:23,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 12:07:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-02-20 12:07:23,299 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-20 12:07:23,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 484 transitions, 12033 flow. Second operand has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 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) [2024-02-20 12:07:23,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:23,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-20 12:07:23,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:24,939 INFO L124 PetriNetUnfolderBase]: 1014/1811 cut-off events. [2024-02-20 12:07:24,940 INFO L125 PetriNetUnfolderBase]: For 17560/17560 co-relation queries the response was YES. [2024-02-20 12:07:24,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22436 conditions, 1811 events. 1014/1811 cut-off events. For 17560/17560 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9053 event pairs, 19 based on Foata normal form. 1/1809 useless extension candidates. Maximal degree in co-relation 15565. Up to 1543 conditions per place. [2024-02-20 12:07:24,963 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 379 selfloop transitions, 121 changer transitions 263/776 dead transitions. [2024-02-20 12:07:24,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 776 transitions, 20872 flow [2024-02-20 12:07:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-20 12:07:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-20 12:07:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 309 transitions. [2024-02-20 12:07:24,966 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3987096774193548 [2024-02-20 12:07:24,966 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 130 predicate places. [2024-02-20 12:07:24,967 INFO L507 AbstractCegarLoop]: Abstraction has has 156 places, 776 transitions, 20872 flow [2024-02-20 12:07:24,967 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.1) internal successors, (183), 30 states have internal predecessors, (183), 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) [2024-02-20 12:07:24,967 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:24,967 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:24,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:25,184 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-20 12:07:25,185 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:25,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 314499495, now seen corresponding path program 9 times [2024-02-20 12:07:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:25,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340624534] [2024-02-20 12:07:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340624534] [2024-02-20 12:07:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340624534] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630998249] [2024-02-20 12:07:25,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:07:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:25,756 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:25,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:07:25,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:07:25,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:25,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:07:25,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:26,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:26,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:26,277 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 35 treesize of output 43 [2024-02-20 12:07:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630998249] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:26,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:26,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2024-02-20 12:07:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364205506] [2024-02-20 12:07:26,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:26,344 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-20 12:07:26,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-20 12:07:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-02-20 12:07:26,533 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-20 12:07:26,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 776 transitions, 20872 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 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) [2024-02-20 12:07:26,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:26,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-20 12:07:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:28,177 INFO L124 PetriNetUnfolderBase]: 1242/2198 cut-off events. [2024-02-20 12:07:28,178 INFO L125 PetriNetUnfolderBase]: For 24995/24995 co-relation queries the response was YES. [2024-02-20 12:07:28,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29058 conditions, 2198 events. 1242/2198 cut-off events. For 24995/24995 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11455 event pairs, 23 based on Foata normal form. 1/2196 useless extension candidates. Maximal degree in co-relation 21539. Up to 1886 conditions per place. [2024-02-20 12:07:28,215 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 553 selfloop transitions, 103 changer transitions 270/939 dead transitions. [2024-02-20 12:07:28,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 939 transitions, 27138 flow [2024-02-20 12:07:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:07:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:07:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 257 transitions. [2024-02-20 12:07:28,217 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3953846153846154 [2024-02-20 12:07:28,218 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-02-20 12:07:28,218 INFO L507 AbstractCegarLoop]: Abstraction has has 181 places, 939 transitions, 27138 flow [2024-02-20 12:07:28,218 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 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) [2024-02-20 12:07:28,218 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:28,218 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:28,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:28,435 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 12:07:28,436 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:28,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 711679761, now seen corresponding path program 10 times [2024-02-20 12:07:28,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:28,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213767517] [2024-02-20 12:07:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:28,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:28,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213767517] [2024-02-20 12:07:28,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213767517] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:28,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323671730] [2024-02-20 12:07:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:07:28,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:28,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:28,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:28,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:07:29,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:07:29,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:29,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:07:29,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:29,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:29,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:29,359 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 35 treesize of output 43 [2024-02-20 12:07:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323671730] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:29,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2024-02-20 12:07:29,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269584439] [2024-02-20 12:07:29,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:29,407 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 12:07:29,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 12:07:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-02-20 12:07:29,538 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:29,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 939 transitions, 27138 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 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) [2024-02-20 12:07:29,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:29,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:29,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:30,756 INFO L124 PetriNetUnfolderBase]: 1358/2397 cut-off events. [2024-02-20 12:07:30,756 INFO L125 PetriNetUnfolderBase]: For 33060/33060 co-relation queries the response was YES. [2024-02-20 12:07:30,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33648 conditions, 2397 events. 1358/2397 cut-off events. For 33060/33060 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12655 event pairs, 27 based on Foata normal form. 1/2395 useless extension candidates. Maximal degree in co-relation 25549. Up to 2069 conditions per place. [2024-02-20 12:07:30,823 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 615 selfloop transitions, 76 changer transitions 275/1028 dead transitions. [2024-02-20 12:07:30,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1028 transitions, 31743 flow [2024-02-20 12:07:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 12:07:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 12:07:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-02-20 12:07:30,826 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44533333333333336 [2024-02-20 12:07:30,826 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 169 predicate places. [2024-02-20 12:07:30,826 INFO L507 AbstractCegarLoop]: Abstraction has has 195 places, 1028 transitions, 31743 flow [2024-02-20 12:07:30,827 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 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) [2024-02-20 12:07:30,827 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:30,827 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:30,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:31,036 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 12:07:31,037 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:31,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash -782998797, now seen corresponding path program 11 times [2024-02-20 12:07:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:31,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629348762] [2024-02-20 12:07:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:31,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:31,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629348762] [2024-02-20 12:07:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629348762] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:31,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731894994] [2024-02-20 12:07:31,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:07:31,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:31,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:31,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:31,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 12:07:31,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:07:31,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:31,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 12:07:31,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:32,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:32,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:32,336 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 35 treesize of output 43 [2024-02-20 12:07:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:32,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731894994] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:32,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:32,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:07:32,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699302545] [2024-02-20 12:07:32,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:32,384 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:07:32,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:07:32,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:07:32,622 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-20 12:07:32,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 1028 transitions, 31743 flow. Second operand has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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) [2024-02-20 12:07:32,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:32,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-20 12:07:32,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:35,223 INFO L124 PetriNetUnfolderBase]: 1551/2740 cut-off events. [2024-02-20 12:07:35,224 INFO L125 PetriNetUnfolderBase]: For 42466/42466 co-relation queries the response was YES. [2024-02-20 12:07:35,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40911 conditions, 2740 events. 1551/2740 cut-off events. For 42466/42466 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15026 event pairs, 27 based on Foata normal form. 1/2738 useless extension candidates. Maximal degree in co-relation 30471. Up to 2379 conditions per place. [2024-02-20 12:07:35,264 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 709 selfloop transitions, 141 changer transitions 338/1201 dead transitions. [2024-02-20 12:07:35,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1201 transitions, 39535 flow [2024-02-20 12:07:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-20 12:07:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-20 12:07:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 311 transitions. [2024-02-20 12:07:35,268 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3658823529411765 [2024-02-20 12:07:35,269 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 202 predicate places. [2024-02-20 12:07:35,269 INFO L507 AbstractCegarLoop]: Abstraction has has 228 places, 1201 transitions, 39535 flow [2024-02-20 12:07:35,270 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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) [2024-02-20 12:07:35,270 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:35,270 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:35,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:35,490 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-20 12:07:35,490 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:35,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1737120777, now seen corresponding path program 12 times [2024-02-20 12:07:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266528927] [2024-02-20 12:07:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266528927] [2024-02-20 12:07:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266528927] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924235002] [2024-02-20 12:07:36,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:07:36,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:36,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:36,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:36,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 12:07:36,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:07:36,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:36,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:07:36,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:07:36,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:36,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:36,822 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 35 treesize of output 43 [2024-02-20 12:07:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924235002] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:36,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-02-20 12:07:36,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521325743] [2024-02-20 12:07:36,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:36,890 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 12:07:36,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 12:07:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 12:07:37,008 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:07:37,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 1201 transitions, 39535 flow. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-02-20 12:07:37,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:37,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:07:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:39,937 INFO L124 PetriNetUnfolderBase]: 1912/3374 cut-off events. [2024-02-20 12:07:39,937 INFO L125 PetriNetUnfolderBase]: For 48651/48651 co-relation queries the response was YES. [2024-02-20 12:07:39,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53992 conditions, 3374 events. 1912/3374 cut-off events. For 48651/48651 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19361 event pairs, 13 based on Foata normal form. 1/3372 useless extension candidates. Maximal degree in co-relation 40801. Up to 2961 conditions per place. [2024-02-20 12:07:39,974 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 854 selfloop transitions, 261 changer transitions 418/1534 dead transitions. [2024-02-20 12:07:39,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1534 transitions, 53000 flow [2024-02-20 12:07:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-20 12:07:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-20 12:07:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 295 transitions. [2024-02-20 12:07:39,976 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-02-20 12:07:39,976 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 233 predicate places. [2024-02-20 12:07:39,976 INFO L507 AbstractCegarLoop]: Abstraction has has 259 places, 1534 transitions, 53000 flow [2024-02-20 12:07:39,976 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-02-20 12:07:39,977 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:39,977 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:39,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:40,190 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:40,190 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:40,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash -546068975, now seen corresponding path program 13 times [2024-02-20 12:07:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:40,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966250458] [2024-02-20 12:07:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:40,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:40,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966250458] [2024-02-20 12:07:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966250458] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890617239] [2024-02-20 12:07:40,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:07:40,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:40,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:40,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:40,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 12:07:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:40,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:07:40,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:40,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:40,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:40,947 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 35 treesize of output 43 [2024-02-20 12:07:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:40,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890617239] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:40,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:40,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2024-02-20 12:07:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498713015] [2024-02-20 12:07:40,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:40,987 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 12:07:40,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 12:07:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-02-20 12:07:41,158 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-20 12:07:41,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 1534 transitions, 53000 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 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) [2024-02-20 12:07:41,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:41,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-20 12:07:41,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:42,841 INFO L124 PetriNetUnfolderBase]: 2186/3845 cut-off events. [2024-02-20 12:07:42,841 INFO L125 PetriNetUnfolderBase]: For 68926/68926 co-relation queries the response was YES. [2024-02-20 12:07:42,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64723 conditions, 3845 events. 2186/3845 cut-off events. For 68926/68926 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22111 event pairs, 13 based on Foata normal form. 2/3844 useless extension candidates. Maximal degree in co-relation 50133. Up to 3398 conditions per place. [2024-02-20 12:07:42,891 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 1071 selfloop transitions, 108 changer transitions 444/1734 dead transitions. [2024-02-20 12:07:42,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1734 transitions, 63467 flow [2024-02-20 12:07:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 12:07:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 12:07:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 212 transitions. [2024-02-20 12:07:42,893 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4463157894736842 [2024-02-20 12:07:42,893 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 251 predicate places. [2024-02-20 12:07:42,894 INFO L507 AbstractCegarLoop]: Abstraction has has 277 places, 1734 transitions, 63467 flow [2024-02-20 12:07:42,894 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 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) [2024-02-20 12:07:42,894 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:42,894 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:42,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-20 12:07:43,106 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 12:07:43,107 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:43,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:43,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1300097783, now seen corresponding path program 14 times [2024-02-20 12:07:43,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:43,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446441963] [2024-02-20 12:07:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446441963] [2024-02-20 12:07:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446441963] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82301522] [2024-02-20 12:07:43,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:07:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:43,648 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:43,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 12:07:43,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:07:43,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:43,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2024-02-20 12:07:43,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:43,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:07:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:43,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:44,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82301522] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:44,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:44,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2024-02-20 12:07:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921221903] [2024-02-20 12:07:44,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:44,118 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 12:07:44,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:44,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 12:07:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 12:07:44,146 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:07:44,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1734 transitions, 63467 flow. Second operand has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-02-20 12:07:44,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:44,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:07:44,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:47,427 INFO L124 PetriNetUnfolderBase]: 2546/4446 cut-off events. [2024-02-20 12:07:47,428 INFO L125 PetriNetUnfolderBase]: For 81229/81229 co-relation queries the response was YES. [2024-02-20 12:07:47,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79306 conditions, 4446 events. 2546/4446 cut-off events. For 81229/81229 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 25948 event pairs, 13 based on Foata normal form. 2/4445 useless extension candidates. Maximal degree in co-relation 63393. Up to 3941 conditions per place. [2024-02-20 12:07:47,583 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1200 selfloop transitions, 370 changer transitions 465/2036 dead transitions. [2024-02-20 12:07:47,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 2036 transitions, 77764 flow [2024-02-20 12:07:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-02-20 12:07:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-02-20 12:07:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 394 transitions. [2024-02-20 12:07:47,588 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3665116279069767 [2024-02-20 12:07:47,589 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 293 predicate places. [2024-02-20 12:07:47,589 INFO L507 AbstractCegarLoop]: Abstraction has has 319 places, 2036 transitions, 77764 flow [2024-02-20 12:07:47,589 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-02-20 12:07:47,589 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:47,589 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:47,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-02-20 12:07:47,798 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:47,798 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:47,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:47,799 INFO L85 PathProgramCache]: Analyzing trace with hash -537913101, now seen corresponding path program 15 times [2024-02-20 12:07:47,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:47,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628528510] [2024-02-20 12:07:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:47,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:07:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:07:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:07:48,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628528510] [2024-02-20 12:07:48,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628528510] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:07:48,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163669483] [2024-02-20 12:07:48,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:07:48,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:07:48,139 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:07:48,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 12:07:48,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:07:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:07:48,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 47 conjunts are in the unsatisfiable core [2024-02-20 12:07:48,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:07:48,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:07:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:48,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:07:49,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-02-20 12:07:49,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:07:49,038 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 68 treesize of output 56 [2024-02-20 12:07:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:07:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163669483] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:07:49,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:07:49,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2024-02-20 12:07:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763691776] [2024-02-20 12:07:49,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:07:49,152 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-20 12:07:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:07:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-20 12:07:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2024-02-20 12:07:49,407 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-20 12:07:49,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 2036 transitions, 77764 flow. Second operand has 37 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 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) [2024-02-20 12:07:49,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:07:49,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-20 12:07:49,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:07:58,757 INFO L124 PetriNetUnfolderBase]: 4193/7139 cut-off events. [2024-02-20 12:07:58,757 INFO L125 PetriNetUnfolderBase]: For 146851/146851 co-relation queries the response was YES. [2024-02-20 12:07:58,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132956 conditions, 7139 events. 4193/7139 cut-off events. For 146851/146851 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 44254 event pairs, 19 based on Foata normal form. 2/7137 useless extension candidates. Maximal degree in co-relation 93551. Up to 6345 conditions per place. [2024-02-20 12:07:59,104 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2008 selfloop transitions, 610 changer transitions 528/3217 dead transitions. [2024-02-20 12:07:59,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 3217 transitions, 129837 flow [2024-02-20 12:07:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-02-20 12:07:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-02-20 12:07:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 620 transitions. [2024-02-20 12:07:59,115 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38153846153846155 [2024-02-20 12:07:59,115 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 357 predicate places. [2024-02-20 12:07:59,115 INFO L507 AbstractCegarLoop]: Abstraction has has 383 places, 3217 transitions, 129837 flow [2024-02-20 12:07:59,115 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 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) [2024-02-20 12:07:59,116 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:07:59,116 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:07:59,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-20 12:07:59,328 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:07:59,329 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:07:59,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:07:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2076338675, now seen corresponding path program 16 times [2024-02-20 12:07:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:07:59,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175945497] [2024-02-20 12:07:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:07:59,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:07:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175945497] [2024-02-20 12:08:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175945497] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129314272] [2024-02-20 12:08:00,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:08:00,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:00,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:00,261 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:00,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 12:08:00,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:08:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:00,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:08:00,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:00,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:00,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:00,803 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 35 treesize of output 43 [2024-02-20 12:08:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:00,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129314272] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:00,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:00,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:08:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896676718] [2024-02-20 12:08:00,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:00,865 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:08:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:08:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:08:01,041 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-20 12:08:01,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 3217 transitions, 129837 flow. Second operand has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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) [2024-02-20 12:08:01,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:01,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-20 12:08:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:14,778 INFO L124 PetriNetUnfolderBase]: 4376/7443 cut-off events. [2024-02-20 12:08:14,778 INFO L125 PetriNetUnfolderBase]: For 166913/166913 co-relation queries the response was YES. [2024-02-20 12:08:14,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145205 conditions, 7443 events. 4376/7443 cut-off events. For 166913/166913 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 46468 event pairs, 23 based on Foata normal form. 1/7440 useless extension candidates. Maximal degree in co-relation 102798. Up to 6619 conditions per place. [2024-02-20 12:08:14,909 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2518 selfloop transitions, 247 changer transitions 530/3366 dead transitions. [2024-02-20 12:08:14,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 3366 transitions, 142486 flow [2024-02-20 12:08:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 12:08:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 12:08:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 273 transitions. [2024-02-20 12:08:14,914 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-02-20 12:08:14,914 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 384 predicate places. [2024-02-20 12:08:14,914 INFO L507 AbstractCegarLoop]: Abstraction has has 410 places, 3366 transitions, 142486 flow [2024-02-20 12:08:14,915 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 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) [2024-02-20 12:08:14,915 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:14,915 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:14,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:15,131 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:15,131 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:15,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash -826413897, now seen corresponding path program 17 times [2024-02-20 12:08:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:15,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755988410] [2024-02-20 12:08:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:15,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755988410] [2024-02-20 12:08:15,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755988410] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60955011] [2024-02-20 12:08:15,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:08:15,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:15,656 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:15,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-20 12:08:15,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 12:08:15,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:15,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 12:08:15,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:15,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:16,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:16,173 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 35 treesize of output 43 [2024-02-20 12:08:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60955011] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:16,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:16,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:08:16,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466293037] [2024-02-20 12:08:16,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:16,227 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:08:16,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:08:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:08:16,327 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:08:16,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 3366 transitions, 142486 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-02-20 12:08:16,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:16,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:08:16,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:24,779 INFO L124 PetriNetUnfolderBase]: 4474/7610 cut-off events. [2024-02-20 12:08:24,779 INFO L125 PetriNetUnfolderBase]: For 171537/171537 co-relation queries the response was YES. [2024-02-20 12:08:24,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156112 conditions, 7610 events. 4474/7610 cut-off events. For 171537/171537 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 47722 event pairs, 21 based on Foata normal form. 1/7607 useless extension candidates. Maximal degree in co-relation 111426. Up to 6772 conditions per place. [2024-02-20 12:08:24,886 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2297 selfloop transitions, 622 changer transitions 536/3456 dead transitions. [2024-02-20 12:08:24,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 3456 transitions, 152792 flow [2024-02-20 12:08:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-20 12:08:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-20 12:08:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 271 transitions. [2024-02-20 12:08:24,887 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36133333333333334 [2024-02-20 12:08:24,888 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 413 predicate places. [2024-02-20 12:08:24,888 INFO L507 AbstractCegarLoop]: Abstraction has has 439 places, 3456 transitions, 152792 flow [2024-02-20 12:08:24,888 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-02-20 12:08:24,888 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:24,888 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:24,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:25,102 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:25,102 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:25,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash -785113993, now seen corresponding path program 18 times [2024-02-20 12:08:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:25,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752438677] [2024-02-20 12:08:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:25,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752438677] [2024-02-20 12:08:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752438677] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808331282] [2024-02-20 12:08:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:08:25,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:25,529 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-20 12:08:25,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:08:25,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:08:25,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 46 conjunts are in the unsatisfiable core [2024-02-20 12:08:25,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:25,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:08:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 12:08:26,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:26,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 41 [2024-02-20 12:08:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:26,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:26,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2024-02-20 12:08:26,749 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2024-02-20 12:08:26,750 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 394 treesize of output 282 [2024-02-20 12:08:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808331282] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:27,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-02-20 12:08:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737910869] [2024-02-20 12:08:27,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:27,167 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-02-20 12:08:27,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-02-20 12:08:27,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2024-02-20 12:08:27,195 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:08:27,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 3456 transitions, 152792 flow. Second operand has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 39 states have internal predecessors, (186), 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) [2024-02-20 12:08:27,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:27,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:08:27,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:08:47,726 INFO L124 PetriNetUnfolderBase]: 5387/9138 cut-off events. [2024-02-20 12:08:47,727 INFO L125 PetriNetUnfolderBase]: For 208329/208329 co-relation queries the response was YES. [2024-02-20 12:08:47,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197248 conditions, 9138 events. 5387/9138 cut-off events. For 208329/208329 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 59350 event pairs, 23 based on Foata normal form. 2/9136 useless extension candidates. Maximal degree in co-relation 142799. Up to 8143 conditions per place. [2024-02-20 12:08:47,914 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2514 selfloop transitions, 1322 changer transitions 567/4404 dead transitions. [2024-02-20 12:08:47,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 4404 transitions, 202902 flow [2024-02-20 12:08:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-02-20 12:08:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-02-20 12:08:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 452 transitions. [2024-02-20 12:08:47,916 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3476923076923077 [2024-02-20 12:08:47,917 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 464 predicate places. [2024-02-20 12:08:47,917 INFO L507 AbstractCegarLoop]: Abstraction has has 490 places, 4404 transitions, 202902 flow [2024-02-20 12:08:47,917 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 39 states have internal predecessors, (186), 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) [2024-02-20 12:08:47,917 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:08:47,917 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:08:47,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-20 12:08:48,134 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-20 12:08:48,135 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:08:48,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:08:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 477950985, now seen corresponding path program 19 times [2024-02-20 12:08:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:08:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478314383] [2024-02-20 12:08:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:08:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:08:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:08:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:08:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478314383] [2024-02-20 12:08:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478314383] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:08:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230897779] [2024-02-20 12:08:48,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:08:48,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:08:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:08:48,725 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:08:48,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-20 12:08:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:08:48,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:08:48,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:08:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:49,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:08:49,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:08:49,202 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 35 treesize of output 43 [2024-02-20 12:08:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:08:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230897779] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:08:49,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:08:49,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:08:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940551376] [2024-02-20 12:08:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:08:49,243 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:08:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:08:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:08:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:08:49,353 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-20 12:08:49,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 4404 transitions, 202902 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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) [2024-02-20 12:08:49,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:08:49,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-20 12:08:49,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:07,507 INFO L124 PetriNetUnfolderBase]: 5584/9465 cut-off events. [2024-02-20 12:09:07,508 INFO L125 PetriNetUnfolderBase]: For 230158/230158 co-relation queries the response was YES. [2024-02-20 12:09:07,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213074 conditions, 9465 events. 5584/9465 cut-off events. For 230158/230158 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 61583 event pairs, 33 based on Foata normal form. 2/9463 useless extension candidates. Maximal degree in co-relation 155121. Up to 8433 conditions per place. [2024-02-20 12:09:07,660 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 3440 selfloop transitions, 249 changer transitions 575/4552 dead transitions. [2024-02-20 12:09:07,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 4552 transitions, 218260 flow [2024-02-20 12:09:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-20 12:09:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-20 12:09:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 322 transitions. [2024-02-20 12:09:07,674 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.368 [2024-02-20 12:09:07,675 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 498 predicate places. [2024-02-20 12:09:07,675 INFO L507 AbstractCegarLoop]: Abstraction has has 524 places, 4552 transitions, 218260 flow [2024-02-20 12:09:07,675 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 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) [2024-02-20 12:09:07,675 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:07,675 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:07,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-02-20 12:09:07,888 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-20 12:09:07,889 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:07,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash 704400551, now seen corresponding path program 20 times [2024-02-20 12:09:07,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:07,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042151460] [2024-02-20 12:09:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:07,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:08,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:08,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042151460] [2024-02-20 12:09:08,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042151460] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:08,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175192964] [2024-02-20 12:09:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:09:08,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:08,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:08,890 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:08,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-20 12:09:09,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:09:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:09:09,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:09:09,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:09:09,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:09,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:09:09,407 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 35 treesize of output 43 [2024-02-20 12:09:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:09:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175192964] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:09,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:09,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 33 [2024-02-20 12:09:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421288346] [2024-02-20 12:09:09,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:09,464 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 12:09:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 12:09:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 12:09:09,558 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:09:09,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 4552 transitions, 218260 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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) [2024-02-20 12:09:09,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:09,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:09:09,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:09:34,538 INFO L124 PetriNetUnfolderBase]: 6024/10163 cut-off events. [2024-02-20 12:09:34,538 INFO L125 PetriNetUnfolderBase]: For 247725/247725 co-relation queries the response was YES. [2024-02-20 12:09:34,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239073 conditions, 10163 events. 6024/10163 cut-off events. For 247725/247725 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 65990 event pairs, 27 based on Foata normal form. 2/10161 useless extension candidates. Maximal degree in co-relation 171651. Up to 9057 conditions per place. [2024-02-20 12:09:34,767 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 3269 selfloop transitions, 1023 changer transitions 580/4873 dead transitions. [2024-02-20 12:09:34,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 4873 transitions, 243016 flow [2024-02-20 12:09:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-20 12:09:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-20 12:09:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 365 transitions. [2024-02-20 12:09:34,769 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37435897435897436 [2024-02-20 12:09:34,770 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 536 predicate places. [2024-02-20 12:09:34,771 INFO L507 AbstractCegarLoop]: Abstraction has has 562 places, 4873 transitions, 243016 flow [2024-02-20 12:09:34,771 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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) [2024-02-20 12:09:34,771 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:09:34,771 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:09:34,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-02-20 12:09:34,989 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:34,989 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:09:34,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:09:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1150880107, now seen corresponding path program 21 times [2024-02-20 12:09:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:09:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365292650] [2024-02-20 12:09:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:09:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:09:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:09:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:35,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:09:35,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365292650] [2024-02-20 12:09:35,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365292650] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:09:35,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842159780] [2024-02-20 12:09:35,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:09:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:09:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:09:35,747 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:09:35,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-20 12:09:35,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:09:35,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:09:35,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 51 conjunts are in the unsatisfiable core [2024-02-20 12:09:35,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:09:35,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:09:36,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:09:36,171 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 15 treesize of output 14 [2024-02-20 12:09:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:36,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:09:36,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-02-20 12:09:36,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:09:36,657 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 78 treesize of output 64 [2024-02-20 12:09:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:09:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842159780] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:09:36,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:09:36,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2024-02-20 12:09:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174550307] [2024-02-20 12:09:36,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:09:36,756 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-20 12:09:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:09:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-20 12:09:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2024-02-20 12:09:36,794 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:09:36,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 4873 transitions, 243016 flow. Second operand has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 41 states have internal predecessors, (198), 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) [2024-02-20 12:09:36,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:09:36,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:09:36,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:10:19,185 INFO L124 PetriNetUnfolderBase]: 7401/12495 cut-off events. [2024-02-20 12:10:19,185 INFO L125 PetriNetUnfolderBase]: For 315063/315063 co-relation queries the response was YES. [2024-02-20 12:10:19,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306450 conditions, 12495 events. 7401/12495 cut-off events. For 315063/315063 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 85109 event pairs, 23 based on Foata normal form. 2/12493 useless extension candidates. Maximal degree in co-relation 217336. Up to 11121 conditions per place. [2024-02-20 12:10:19,457 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 3610 selfloop transitions, 1921 changer transitions 615/6147 dead transitions. [2024-02-20 12:10:19,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 6147 transitions, 316796 flow [2024-02-20 12:10:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-02-20 12:10:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-02-20 12:10:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 655 transitions. [2024-02-20 12:10:19,460 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3447368421052632 [2024-02-20 12:10:19,461 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 611 predicate places. [2024-02-20 12:10:19,461 INFO L507 AbstractCegarLoop]: Abstraction has has 637 places, 6147 transitions, 316796 flow [2024-02-20 12:10:19,461 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 41 states have internal predecessors, (198), 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) [2024-02-20 12:10:19,461 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:10:19,462 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:10:19,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-20 12:10:19,677 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:10:19,677 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:10:19,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:10:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash 365233161, now seen corresponding path program 22 times [2024-02-20 12:10:19,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:10:19,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712959999] [2024-02-20 12:10:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:10:19,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:10:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:10:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:10:20,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:10:20,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712959999] [2024-02-20 12:10:20,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712959999] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:10:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465501884] [2024-02-20 12:10:20,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:10:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:10:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:10:20,505 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:10:20,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-20 12:10:20,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:10:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:10:20,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:10:20,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:10:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:10:20,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:10:20,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:10:20,900 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 42 treesize of output 45 [2024-02-20 12:10:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:10:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465501884] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:10:21,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:10:21,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:10:21,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638368907] [2024-02-20 12:10:21,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:10:21,017 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:10:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:10:21,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:10:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:10:21,144 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:10:21,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 6147 transitions, 316796 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-02-20 12:10:21,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:10:21,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:10:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:17,114 INFO L124 PetriNetUnfolderBase]: 8158/13777 cut-off events. [2024-02-20 12:11:17,114 INFO L125 PetriNetUnfolderBase]: For 349853/349853 co-relation queries the response was YES. [2024-02-20 12:11:17,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351622 conditions, 13777 events. 8158/13777 cut-off events. For 349853/349853 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 95696 event pairs, 27 based on Foata normal form. 1/13774 useless extension candidates. Maximal degree in co-relation 246140. Up to 12295 conditions per place. [2024-02-20 12:11:17,585 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 4672 selfloop transitions, 1545 changer transitions 623/6841 dead transitions. [2024-02-20 12:11:17,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 6841 transitions, 364872 flow [2024-02-20 12:11:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-02-20 12:11:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-02-20 12:11:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 431 transitions. [2024-02-20 12:11:17,588 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35183673469387755 [2024-02-20 12:11:17,588 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 659 predicate places. [2024-02-20 12:11:17,588 INFO L507 AbstractCegarLoop]: Abstraction has has 685 places, 6841 transitions, 364872 flow [2024-02-20 12:11:17,589 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-02-20 12:11:17,589 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:17,589 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:17,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-02-20 12:11:17,804 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-20 12:11:17,805 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:17,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1088135121, now seen corresponding path program 23 times [2024-02-20 12:11:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:17,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336834481] [2024-02-20 12:11:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:17,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336834481] [2024-02-20 12:11:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336834481] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37037871] [2024-02-20 12:11:18,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:11:18,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:18,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:18,357 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:11:18,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-20 12:11:18,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 12:11:18,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:18,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 12:11:18,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:11:18,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:18,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:11:18,808 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 42 treesize of output 45 [2024-02-20 12:11:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:11:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37037871] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:18,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:11:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977745202] [2024-02-20 12:11:18,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:18,883 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:11:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:11:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:11:18,973 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:11:18,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 6841 transitions, 364872 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-02-20 12:11:18,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:18,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:11:18,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:23,295 INFO L124 PetriNetUnfolderBase]: 8397/14181 cut-off events. [2024-02-20 12:12:23,295 INFO L125 PetriNetUnfolderBase]: For 344870/344870 co-relation queries the response was YES. [2024-02-20 12:12:23,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376095 conditions, 14181 events. 8397/14181 cut-off events. For 344870/344870 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 99215 event pairs, 17 based on Foata normal form. 1/14178 useless extension candidates. Maximal degree in co-relation 266366. Up to 12645 conditions per place. [2024-02-20 12:12:23,556 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 5080 selfloop transitions, 1332 changer transitions 627/7040 dead transitions. [2024-02-20 12:12:23,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 7040 transitions, 389119 flow [2024-02-20 12:12:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 12:12:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 12:12:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 239 transitions. [2024-02-20 12:12:23,557 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3824 [2024-02-20 12:12:23,558 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 683 predicate places. [2024-02-20 12:12:23,558 INFO L507 AbstractCegarLoop]: Abstraction has has 709 places, 7040 transitions, 389119 flow [2024-02-20 12:12:23,558 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-02-20 12:12:23,558 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:12:23,559 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:12:23,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-02-20 12:12:23,770 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-02-20 12:12:23,771 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:12:23,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:12:23,771 INFO L85 PathProgramCache]: Analyzing trace with hash 477503893, now seen corresponding path program 24 times [2024-02-20 12:12:23,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:12:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109446040] [2024-02-20 12:12:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:12:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:12:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:24,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:12:24,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109446040] [2024-02-20 12:12:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109446040] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:12:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502265164] [2024-02-20 12:12:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:12:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:12:24,169 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:12:24,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-20 12:12:24,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:12:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:12:24,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:12:24,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:12:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:12:24,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:12:24,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:12:24,738 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 42 treesize of output 45 [2024-02-20 12:12:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:12:24,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502265164] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:12:24,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:12:24,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-02-20 12:12:24,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226026764] [2024-02-20 12:12:24,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:12:24,806 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 12:12:24,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:12:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 12:12:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 12:12:24,832 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:12:24,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 7040 transitions, 389119 flow. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-02-20 12:12:24,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:24,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:12:24,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:22,232 INFO L124 PetriNetUnfolderBase]: 8707/14700 cut-off events. [2024-02-20 12:13:22,233 INFO L125 PetriNetUnfolderBase]: For 361212/361212 co-relation queries the response was YES. [2024-02-20 12:13:22,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404646 conditions, 14700 events. 8707/14700 cut-off events. For 361212/361212 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 103319 event pairs, 15 based on Foata normal form. 2/14698 useless extension candidates. Maximal degree in co-relation 290209. Up to 13122 conditions per place. [2024-02-20 12:13:22,612 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 5247 selfloop transitions, 1426 changer transitions 640/7314 dead transitions. [2024-02-20 12:13:22,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 7314 transitions, 418755 flow [2024-02-20 12:13:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-20 12:13:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-20 12:13:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 338 transitions. [2024-02-20 12:13:22,621 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3654054054054054 [2024-02-20 12:13:22,624 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 719 predicate places. [2024-02-20 12:13:22,624 INFO L507 AbstractCegarLoop]: Abstraction has has 745 places, 7314 transitions, 418755 flow [2024-02-20 12:13:22,625 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-02-20 12:13:22,625 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:22,625 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:22,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-02-20 12:13:22,842 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-20 12:13:22,844 INFO L432 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:13:22,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -27357031, now seen corresponding path program 25 times [2024-02-20 12:13:22,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:22,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035695632] [2024-02-20 12:13:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:23,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035695632] [2024-02-20 12:13:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035695632] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762514147] [2024-02-20 12:13:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:13:23,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:23,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:23,589 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:13:23,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-20 12:13:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:23,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:13:23,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:13:23,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:23,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:13:23,991 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 42 treesize of output 45 [2024-02-20 12:13:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:13:24,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762514147] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:24,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-02-20 12:13:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458140541] [2024-02-20 12:13:24,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:24,055 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 12:13:24,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 12:13:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-02-20 12:13:24,143 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:13:24,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 7314 transitions, 418755 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-02-20 12:13:24,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:24,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:13:24,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:14:26,692 INFO L124 PetriNetUnfolderBase]: 8884/14996 cut-off events. [2024-02-20 12:14:26,692 INFO L125 PetriNetUnfolderBase]: For 366488/366488 co-relation queries the response was YES. [2024-02-20 12:14:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427917 conditions, 14996 events. 8884/14996 cut-off events. For 366488/366488 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 105698 event pairs, 15 based on Foata normal form. 1/14993 useless extension candidates. Maximal degree in co-relation 309295. Up to 13390 conditions per place. [2024-02-20 12:14:26,988 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 5383 selfloop transitions, 1427 changer transitions 642/7453 dead transitions. [2024-02-20 12:14:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 7453 transitions, 441534 flow [2024-02-20 12:14:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-20 12:14:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-20 12:14:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 313 transitions. [2024-02-20 12:14:26,990 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3577142857142857 [2024-02-20 12:14:26,990 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 753 predicate places. [2024-02-20 12:14:26,990 INFO L507 AbstractCegarLoop]: Abstraction has has 779 places, 7453 transitions, 441534 flow [2024-02-20 12:14:26,990 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-02-20 12:14:26,991 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:14:26,991 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:14:27,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-20 12:14:27,202 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:27,203 INFO L432 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:14:27,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:14:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash 715121147, now seen corresponding path program 26 times [2024-02-20 12:14:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:14:27,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368889211] [2024-02-20 12:14:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:14:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:14:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:14:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:27,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:14:27,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368889211] [2024-02-20 12:14:27,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368889211] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:14:27,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275379638] [2024-02-20 12:14:27,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:14:27,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:14:27,566 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:14:27,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-20 12:14:27,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:14:27,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:14:27,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 47 conjunts are in the unsatisfiable core [2024-02-20 12:14:27,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:14:27,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:14:27,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:14:27,976 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 15 treesize of output 14 [2024-02-20 12:14:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:28,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:14:28,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-02-20 12:14:28,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:14:28,540 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 68 treesize of output 56 [2024-02-20 12:14:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275379638] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:14:28,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:14:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 37 [2024-02-20 12:14:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573267053] [2024-02-20 12:14:28,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:14:28,635 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 12:14:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:14:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 12:14:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 12:14:28,690 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:14:28,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 7453 transitions, 441534 flow. Second operand has 38 states, 38 states have (on average 5.0) internal successors, (190), 38 states have internal predecessors, (190), 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) [2024-02-20 12:14:28,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:14:28,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:14:28,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:15:32,941 INFO L124 PetriNetUnfolderBase]: 9347/15801 cut-off events. [2024-02-20 12:15:32,942 INFO L125 PetriNetUnfolderBase]: For 391092/391092 co-relation queries the response was YES. [2024-02-20 12:15:32,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467041 conditions, 15801 events. 9347/15801 cut-off events. For 391092/391092 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 113006 event pairs, 19 based on Foata normal form. 2/15799 useless extension candidates. Maximal degree in co-relation 340445. Up to 14133 conditions per place. [2024-02-20 12:15:33,230 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 5772 selfloop transitions, 1456 changer transitions 678/7907 dead transitions. [2024-02-20 12:15:33,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 818 places, 7907 transitions, 484210 flow [2024-02-20 12:15:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-20 12:15:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-20 12:15:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 372 transitions. [2024-02-20 12:15:33,232 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.372 [2024-02-20 12:15:33,232 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 792 predicate places. [2024-02-20 12:15:33,232 INFO L507 AbstractCegarLoop]: Abstraction has has 818 places, 7907 transitions, 484210 flow [2024-02-20 12:15:33,232 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.0) internal successors, (190), 38 states have internal predecessors, (190), 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) [2024-02-20 12:15:33,232 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:15:33,232 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:15:33,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-02-20 12:15:33,447 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:15:33,448 INFO L432 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:15:33,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:15:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1302866469, now seen corresponding path program 27 times [2024-02-20 12:15:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:15:33,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765903856] [2024-02-20 12:15:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:15:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:15:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:15:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:15:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:15:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765903856] [2024-02-20 12:15:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765903856] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:15:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653623836] [2024-02-20 12:15:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:15:33,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:15:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:15:33,897 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:15:33,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-20 12:15:34,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 12:15:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:15:34,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 47 conjunts are in the unsatisfiable core [2024-02-20 12:15:34,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:15:34,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:15:34,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:15:34,273 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 15 treesize of output 14 [2024-02-20 12:15:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:15:34,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:15:34,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-02-20 12:15:34,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:15:34,801 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 68 treesize of output 56 [2024-02-20 12:15:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:15:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653623836] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:15:35,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:15:35,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 39 [2024-02-20 12:15:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144584936] [2024-02-20 12:15:35,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:15:35,054 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-02-20 12:15:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:15:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-02-20 12:15:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2024-02-20 12:15:35,070 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:15:35,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 7907 transitions, 484210 flow. Second operand has 40 states, 40 states have (on average 4.9) internal successors, (196), 40 states have internal predecessors, (196), 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) [2024-02-20 12:15:35,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:15:35,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:15:35,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:16:45,429 INFO L124 PetriNetUnfolderBase]: 9611/16258 cut-off events. [2024-02-20 12:16:45,430 INFO L125 PetriNetUnfolderBase]: For 404321/404321 co-relation queries the response was YES. [2024-02-20 12:16:45,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496755 conditions, 16258 events. 9611/16258 cut-off events. For 404321/404321 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 117162 event pairs, 17 based on Foata normal form. 2/16256 useless extension candidates. Maximal degree in co-relation 364377. Up to 14548 conditions per place. [2024-02-20 12:16:45,744 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 4993 selfloop transitions, 2473 changer transitions 693/8160 dead transitions. [2024-02-20 12:16:45,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 8160 transitions, 515775 flow [2024-02-20 12:16:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-02-20 12:16:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-02-20 12:16:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 466 transitions. [2024-02-20 12:16:45,746 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35846153846153844 [2024-02-20 12:16:45,746 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 843 predicate places. [2024-02-20 12:16:45,746 INFO L507 AbstractCegarLoop]: Abstraction has has 869 places, 8160 transitions, 515775 flow [2024-02-20 12:16:45,746 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.9) internal successors, (196), 40 states have internal predecessors, (196), 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) [2024-02-20 12:16:45,747 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:16:45,747 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:16:45,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-02-20 12:16:45,952 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:16:45,952 INFO L432 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:16:45,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:16:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1766900565, now seen corresponding path program 28 times [2024-02-20 12:16:45,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:16:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143950541] [2024-02-20 12:16:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:16:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:16:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:16:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:16:46,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:16:46,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143950541] [2024-02-20 12:16:46,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143950541] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:16:46,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402018961] [2024-02-20 12:16:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:16:46,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:16:46,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:16:46,416 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:16:46,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-20 12:16:46,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:16:46,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:16:46,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 12:16:46,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:16:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:16:46,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:16:46,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:16:46,776 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 42 treesize of output 45 [2024-02-20 12:16:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:16:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402018961] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:16:46,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:16:46,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 9] total 26 [2024-02-20 12:16:46,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436296769] [2024-02-20 12:16:46,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:16:46,854 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 12:16:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:16:46,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 12:16:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-02-20 12:16:46,945 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:16:46,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 8160 transitions, 515775 flow. Second operand has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 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) [2024-02-20 12:16:46,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:16:46,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:16:46,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:18:03,874 INFO L124 PetriNetUnfolderBase]: 9779/16539 cut-off events. [2024-02-20 12:18:03,874 INFO L125 PetriNetUnfolderBase]: For 409351/409351 co-relation queries the response was YES. [2024-02-20 12:18:03,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521918 conditions, 16539 events. 9779/16539 cut-off events. For 409351/409351 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 119455 event pairs, 19 based on Foata normal form. 1/16536 useless extension candidates. Maximal degree in co-relation 385174. Up to 14809 conditions per place. [2024-02-20 12:18:04,350 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 6006 selfloop transitions, 1598 changer transitions 695/8300 dead transitions. [2024-02-20 12:18:04,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 8300 transitions, 541181 flow [2024-02-20 12:18:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-02-20 12:18:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-02-20 12:18:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 368 transitions. [2024-02-20 12:18:04,352 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3504761904761905 [2024-02-20 12:18:04,352 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 884 predicate places. [2024-02-20 12:18:04,352 INFO L507 AbstractCegarLoop]: Abstraction has has 910 places, 8300 transitions, 541181 flow [2024-02-20 12:18:04,352 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 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) [2024-02-20 12:18:04,352 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:18:04,353 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:18:04,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-02-20 12:18:04,564 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-02-20 12:18:04,565 INFO L432 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:18:04,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:18:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1457715153, now seen corresponding path program 29 times [2024-02-20 12:18:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:18:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682088461] [2024-02-20 12:18:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:18:04,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:18:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:18:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:18:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682088461] [2024-02-20 12:18:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682088461] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:18:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867546170] [2024-02-20 12:18:05,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:18:05,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:18:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:18:05,024 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:18:05,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-20 12:18:05,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 12:18:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:18:05,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2024-02-20 12:18:05,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:18:05,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 12:18:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:18:05,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:18:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:18:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867546170] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:18:05,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:18:05,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2024-02-20 12:18:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494212556] [2024-02-20 12:18:05,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:18:05,694 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 12:18:05,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:18:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 12:18:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 12:18:05,790 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:18:05,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 910 places, 8300 transitions, 541181 flow. Second operand has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-02-20 12:18:05,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:18:05,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:18:05,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:19:48,502 INFO L124 PetriNetUnfolderBase]: 9960/16845 cut-off events. [2024-02-20 12:19:48,502 INFO L125 PetriNetUnfolderBase]: For 428086/428086 co-relation queries the response was YES. [2024-02-20 12:19:48,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548429 conditions, 16845 events. 9960/16845 cut-off events. For 428086/428086 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 122150 event pairs, 15 based on Foata normal form. 1/16842 useless extension candidates. Maximal degree in co-relation 406822. Up to 15079 conditions per place. [2024-02-20 12:19:49,034 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 6193 selfloop transitions, 1559 changer transitions 700/8453 dead transitions. [2024-02-20 12:19:49,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 935 places, 8453 transitions, 567766 flow [2024-02-20 12:19:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:19:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:19:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 247 transitions. [2024-02-20 12:19:49,036 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-02-20 12:19:49,036 INFO L308 CegarLoopForPetriNet]: 26 programPoint places, 909 predicate places. [2024-02-20 12:19:49,036 INFO L507 AbstractCegarLoop]: Abstraction has has 935 places, 8453 transitions, 567766 flow [2024-02-20 12:19:49,037 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-02-20 12:19:49,037 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:19:49,037 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:19:49,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-02-20 12:19:49,248 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:19:49,248 INFO L432 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:19:49,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:19:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 107923861, now seen corresponding path program 30 times [2024-02-20 12:19:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:19:49,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100081816] [2024-02-20 12:19:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:19:49,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:19:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:19:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:19:49,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:19:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100081816] [2024-02-20 12:19:49,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100081816] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:19:49,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083014862] [2024-02-20 12:19:49,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:19:49,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:19:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:19:49,925 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:19:49,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-20 12:19:50,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-02-20 12:19:50,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:19:50,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 12:19:50,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:19:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:19:50,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:19:50,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 12:19:50,391 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 42 treesize of output 45 [2024-02-20 12:19:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 12:19:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083014862] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:19:50,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:19:50,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-02-20 12:19:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14077457] [2024-02-20 12:19:50,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:19:50,464 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 12:19:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:19:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 12:19:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 12:19:50,503 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-20 12:19:50,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 935 places, 8453 transitions, 567766 flow. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-02-20 12:19:50,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:19:50,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-20 12:19:50,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15