./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/clever.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/clever.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 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:35:39,507 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:35:39,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:35:39,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:35:39,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:35:39,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:35:39,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:35:39,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:35:39,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:35:39,644 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:35:39,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:35:39,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:35:39,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:35:39,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:35:39,647 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:35:39,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:35:39,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:35:39,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:35:39,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:35:39,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:35:39,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:35:39,649 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:35:39,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:35:39,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:35:39,650 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:35:39,650 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:35:39,651 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:35:39,651 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:35:39,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:35:39,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:35:39,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:35:39,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:35:39,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:35:39,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:35:39,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:35:39,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:35:39,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:35:39,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:35:39,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:35:39,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:35:39,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:35:39,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:35:39,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:35:39,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:35:39,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:35:40,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:35:40,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:35:40,030 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:35:40,030 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:35:40,032 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2024-02-19 14:35:41,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:35:41,408 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:35:41,410 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2024-02-19 14:35:41,419 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a61cfe1/0b061792fb8b4585a4ccda76c1edb01b/FLAG3b0e1456c [2024-02-19 14:35:41,436 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a61cfe1/0b061792fb8b4585a4ccda76c1edb01b [2024-02-19 14:35:41,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:35:41,439 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:35:41,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:35:41,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:35:41,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:35:41,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4afabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41, skipping insertion in model container [2024-02-19 14:35:41,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:35:41,653 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/clever.wvr.c[2133,2146] [2024-02-19 14:35:41,658 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:35:41,670 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:35:41,704 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/clever.wvr.c[2133,2146] [2024-02-19 14:35:41,705 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:35:41,722 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:35:41,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41 WrapperNode [2024-02-19 14:35:41,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:35:41,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:35:41,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:35:41,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:35:41,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,774 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2024-02-19 14:35:41,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:35:41,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:35:41,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:35:41,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:35:41,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,812 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-19 14:35:41,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:35:41,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:35:41,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:35:41,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:35:41,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (1/1) ... [2024-02-19 14:35:41,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:35:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:41,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-19 14:35:41,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-19 14:35:41,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:35:41,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:35:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:35:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:35:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:35:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:35:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:35:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:35:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:35:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:35:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:35:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:35:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:35:41,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:35:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:35:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:35:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:35:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:35:41,948 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:35:42,065 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:35:42,067 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:35:42,313 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:35:42,315 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:35:42,588 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:35:42,589 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 14:35:42,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:35:42 BoogieIcfgContainer [2024-02-19 14:35:42,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:35:42,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:35:42,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:35:42,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:35:42,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:35:41" (1/3) ... [2024-02-19 14:35:42,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60337f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:35:42, skipping insertion in model container [2024-02-19 14:35:42,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:35:41" (2/3) ... [2024-02-19 14:35:42,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60337f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:35:42, skipping insertion in model container [2024-02-19 14:35:42,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:35:42" (3/3) ... [2024-02-19 14:35:42,601 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-02-19 14:35:42,619 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:35:42,619 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:35:42,620 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:35:42,653 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 14:35:42,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions, 52 flow [2024-02-19 14:35:42,729 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-02-19 14:35:42,730 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:35:42,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 3/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-02-19 14:35:42,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 19 transitions, 52 flow [2024-02-19 14:35:42,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 44 flow [2024-02-19 14:35:42,751 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:35:42,760 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;@5248f5f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:35:42,760 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:35:42,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:35:42,772 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2024-02-19 14:35:42,772 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:35:42,772 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:42,773 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:42,774 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:42,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1229899118, now seen corresponding path program 1 times [2024-02-19 14:35:42,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:42,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950435627] [2024-02-19 14:35:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:43,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950435627] [2024-02-19 14:35:43,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950435627] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:35:43,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:35:43,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:35:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359957193] [2024-02-19 14:35:43,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:35:43,333 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:35:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:35:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:35:43,392 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:43,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:43,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:43,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:43,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:43,531 INFO L124 PetriNetUnfolderBase]: 69/118 cut-off events. [2024-02-19 14:35:43,532 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-19 14:35:43,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 118 events. 69/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 278 event pairs, 15 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2024-02-19 14:35:43,535 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-02-19 14:35:43,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 131 flow [2024-02-19 14:35:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:35:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:35:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-02-19 14:35:43,547 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-02-19 14:35:43,550 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2024-02-19 14:35:43,551 INFO L507 AbstractCegarLoop]: Abstraction has has 22 places, 28 transitions, 131 flow [2024-02-19 14:35:43,551 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:43,551 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:43,551 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:43,552 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:35:43,552 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:43,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash -424534855, now seen corresponding path program 1 times [2024-02-19 14:35:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:43,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026110363] [2024-02-19 14:35:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:43,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:43,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:43,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026110363] [2024-02-19 14:35:43,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026110363] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:35:43,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:35:43,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:35:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026078522] [2024-02-19 14:35:43,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:35:43,627 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:35:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:35:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:35:43,629 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:43,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 28 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:43,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:43,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:43,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:43,729 INFO L124 PetriNetUnfolderBase]: 125/218 cut-off events. [2024-02-19 14:35:43,730 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-19 14:35:43,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 218 events. 125/218 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 656 event pairs, 7 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 560. Up to 129 conditions per place. [2024-02-19 14:35:43,741 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 56 selfloop transitions, 12 changer transitions 12/81 dead transitions. [2024-02-19 14:35:43,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 81 transitions, 530 flow [2024-02-19 14:35:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:35:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:35:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-02-19 14:35:43,743 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2024-02-19 14:35:43,744 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2024-02-19 14:35:43,744 INFO L507 AbstractCegarLoop]: Abstraction has has 26 places, 81 transitions, 530 flow [2024-02-19 14:35:43,745 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:43,745 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:43,745 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:43,745 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:35:43,746 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:43,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1912221405, now seen corresponding path program 2 times [2024-02-19 14:35:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:43,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427355237] [2024-02-19 14:35:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:43,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427355237] [2024-02-19 14:35:43,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427355237] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:35:43,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:35:43,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:35:43,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753516442] [2024-02-19 14:35:43,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:35:43,808 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:35:43,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:35:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:35:43,810 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:43,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 81 transitions, 530 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:43,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:43,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:43,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:43,894 INFO L124 PetriNetUnfolderBase]: 125/211 cut-off events. [2024-02-19 14:35:43,895 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-02-19 14:35:43,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 211 events. 125/211 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 633 event pairs, 2 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 748. Up to 120 conditions per place. [2024-02-19 14:35:43,898 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 65 selfloop transitions, 20 changer transitions 12/98 dead transitions. [2024-02-19 14:35:43,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 98 transitions, 829 flow [2024-02-19 14:35:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:35:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:35:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2024-02-19 14:35:43,900 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5684210526315789 [2024-02-19 14:35:43,901 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2024-02-19 14:35:43,901 INFO L507 AbstractCegarLoop]: Abstraction has has 30 places, 98 transitions, 829 flow [2024-02-19 14:35:43,902 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:43,902 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:43,902 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:43,902 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:35:43,902 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:43,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1434276550, now seen corresponding path program 1 times [2024-02-19 14:35:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774121670] [2024-02-19 14:35:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:35:43,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:43,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774121670] [2024-02-19 14:35:43,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774121670] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:43,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338211239] [2024-02-19 14:35:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:43,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:43,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:43,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:35:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:44,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:35:44,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:35:44,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:35:44,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338211239] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:44,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:44,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-02-19 14:35:44,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658662523] [2024-02-19 14:35:44,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:44,216 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 14:35:44,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 14:35:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-19 14:35:44,217 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:44,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 98 transitions, 829 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:44,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:44,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:44,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:44,355 INFO L124 PetriNetUnfolderBase]: 138/245 cut-off events. [2024-02-19 14:35:44,355 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-19 14:35:44,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 245 events. 138/245 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 2 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 1065. Up to 166 conditions per place. [2024-02-19 14:35:44,358 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 92 selfloop transitions, 14 changer transitions 12/119 dead transitions. [2024-02-19 14:35:44,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 119 transitions, 1242 flow [2024-02-19 14:35:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:35:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:35:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-02-19 14:35:44,359 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6105263157894737 [2024-02-19 14:35:44,360 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2024-02-19 14:35:44,360 INFO L507 AbstractCegarLoop]: Abstraction has has 34 places, 119 transitions, 1242 flow [2024-02-19 14:35:44,361 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:44,361 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:44,361 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:44,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:44,583 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 [2024-02-19 14:35:44,583 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:44,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -615063956, now seen corresponding path program 1 times [2024-02-19 14:35:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:44,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897707431] [2024-02-19 14:35:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897707431] [2024-02-19 14:35:44,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897707431] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:44,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489726263] [2024-02-19 14:35:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:44,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:44,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:44,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:35:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:44,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:35:44,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:45,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489726263] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:45,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:45,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-02-19 14:35:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961049381] [2024-02-19 14:35:45,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:45,274 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:35:45,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:35:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:35:45,276 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:45,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 119 transitions, 1242 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:45,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:45,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:45,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:45,602 INFO L124 PetriNetUnfolderBase]: 279/484 cut-off events. [2024-02-19 14:35:45,602 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-02-19 14:35:45,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2946 conditions, 484 events. 279/484 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1880 event pairs, 2 based on Foata normal form. 2/336 useless extension candidates. Maximal degree in co-relation 2488. Up to 403 conditions per place. [2024-02-19 14:35:45,609 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 171 selfloop transitions, 41 changer transitions 26/239 dead transitions. [2024-02-19 14:35:45,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 239 transitions, 2963 flow [2024-02-19 14:35:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 14:35:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 14:35:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-02-19 14:35:45,617 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6198830409356725 [2024-02-19 14:35:45,619 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2024-02-19 14:35:45,619 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 239 transitions, 2963 flow [2024-02-19 14:35:45,620 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:45,620 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:45,620 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:45,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:45,839 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 [2024-02-19 14:35:45,840 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:45,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:45,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1458185364, now seen corresponding path program 2 times [2024-02-19 14:35:45,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:45,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881250789] [2024-02-19 14:35:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:45,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881250789] [2024-02-19 14:35:46,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881250789] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061220884] [2024-02-19 14:35:46,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:35:46,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:46,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:46,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:35:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:35:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:46,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:35:46,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:46,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061220884] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:50,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-02-19 14:35:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210218120] [2024-02-19 14:35:50,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:50,701 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:35:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:35:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=102, Unknown=1, NotChecked=0, Total=156 [2024-02-19 14:35:50,703 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:50,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 239 transitions, 2963 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:50,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:50,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:50,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:51,995 INFO L124 PetriNetUnfolderBase]: 798/1370 cut-off events. [2024-02-19 14:35:51,995 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-02-19 14:35:51,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9674 conditions, 1370 events. 798/1370 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6775 event pairs, 2 based on Foata normal form. 9/921 useless extension candidates. Maximal degree in co-relation 8538. Up to 1284 conditions per place. [2024-02-19 14:35:52,008 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 437 selfloop transitions, 149 changer transitions 87/674 dead transitions. [2024-02-19 14:35:52,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 674 transitions, 9718 flow [2024-02-19 14:35:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 14:35:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 14:35:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 215 transitions. [2024-02-19 14:35:52,011 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6656346749226006 [2024-02-19 14:35:52,014 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2024-02-19 14:35:52,014 INFO L507 AbstractCegarLoop]: Abstraction has has 58 places, 674 transitions, 9718 flow [2024-02-19 14:35:52,014 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:52,014 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:52,014 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:52,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:52,228 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 [2024-02-19 14:35:52,229 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:52,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash 119156366, now seen corresponding path program 3 times [2024-02-19 14:35:52,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:52,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868338842] [2024-02-19 14:35:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:52,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868338842] [2024-02-19 14:35:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868338842] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986418798] [2024-02-19 14:35:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:35:52,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:52,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:52,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:35:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:35:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:35:52,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 14:35:52,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:52,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:53,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986418798] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:53,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:53,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-02-19 14:35:53,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755171725] [2024-02-19 14:35:53,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:53,116 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:35:53,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:35:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:35:53,117 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:53,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 674 transitions, 9718 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:53,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:53,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:53,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:54,266 INFO L124 PetriNetUnfolderBase]: 1630/2810 cut-off events. [2024-02-19 14:35:54,267 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2024-02-19 14:35:54,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22650 conditions, 2810 events. 1630/2810 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16019 event pairs, 2 based on Foata normal form. 12/1876 useless extension candidates. Maximal degree in co-relation 20246. Up to 2718 conditions per place. [2024-02-19 14:35:54,295 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 870 selfloop transitions, 295 changer transitions 209/1375 dead transitions. [2024-02-19 14:35:54,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 1375 transitions, 22607 flow [2024-02-19 14:35:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:35:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:35:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-02-19 14:35:54,297 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6507177033492823 [2024-02-19 14:35:54,298 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2024-02-19 14:35:54,298 INFO L507 AbstractCegarLoop]: Abstraction has has 68 places, 1375 transitions, 22607 flow [2024-02-19 14:35:54,298 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:54,298 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:54,298 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:54,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:35:54,513 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 [2024-02-19 14:35:54,514 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:54,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash -439366042, now seen corresponding path program 2 times [2024-02-19 14:35:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840247766] [2024-02-19 14:35:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:35:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840247766] [2024-02-19 14:35:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840247766] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:35:54,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:35:54,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:35:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269168780] [2024-02-19 14:35:54,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:35:54,586 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:35:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:35:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:35:54,590 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:54,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 1375 transitions, 22607 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:54,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:54,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:54,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:35:55,500 INFO L124 PetriNetUnfolderBase]: 1660/2882 cut-off events. [2024-02-19 14:35:55,501 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2024-02-19 14:35:55,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26079 conditions, 2882 events. 1660/2882 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16847 event pairs, 2 based on Foata normal form. 0/1926 useless extension candidates. Maximal degree in co-relation 23296. Up to 2802 conditions per place. [2024-02-19 14:35:55,536 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 1197 selfloop transitions, 124 changer transitions 320/1642 dead transitions. [2024-02-19 14:35:55,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 1642 transitions, 30275 flow [2024-02-19 14:35:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:35:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:35:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-02-19 14:35:55,538 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2024-02-19 14:35:55,540 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2024-02-19 14:35:55,540 INFO L507 AbstractCegarLoop]: Abstraction has has 72 places, 1642 transitions, 30275 flow [2024-02-19 14:35:55,540 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:55,540 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:35:55,540 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:35:55,541 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-19 14:35:55,541 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:35:55,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:35:55,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1274455156, now seen corresponding path program 1 times [2024-02-19 14:35:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:35:55,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782422926] [2024-02-19 14:35:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:55,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:35:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:55,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:35:55,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782422926] [2024-02-19 14:35:55,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782422926] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:35:55,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341132085] [2024-02-19 14:35:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:35:55,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:35:55,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:35:55,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:35:56,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:35:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:35:56,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-19 14:35:56,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:35:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:35:56,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:35:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:35:57,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341132085] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:35:57,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:35:57,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-02-19 14:35:57,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887286350] [2024-02-19 14:35:57,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:35:57,293 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:35:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:35:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:35:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:35:57,294 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:35:57,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 1642 transitions, 30275 flow. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:35:57,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:35:57,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:35:57,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:00,899 INFO L124 PetriNetUnfolderBase]: 2691/4660 cut-off events. [2024-02-19 14:36:00,899 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2024-02-19 14:36:00,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46827 conditions, 4660 events. 2691/4660 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 28424 event pairs, 2 based on Foata normal form. 20/3104 useless extension candidates. Maximal degree in co-relation 42569. Up to 4574 conditions per place. [2024-02-19 14:36:00,946 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1813 selfloop transitions, 322 changer transitions 533/2669 dead transitions. [2024-02-19 14:36:00,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 2669 transitions, 54535 flow [2024-02-19 14:36:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 14:36:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 14:36:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-02-19 14:36:00,949 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6177285318559557 [2024-02-19 14:36:00,950 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2024-02-19 14:36:00,950 INFO L507 AbstractCegarLoop]: Abstraction has has 90 places, 2669 transitions, 54535 flow [2024-02-19 14:36:00,950 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:00,950 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:00,950 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:00,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:36:01,172 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:01,173 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:01,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash 466777424, now seen corresponding path program 2 times [2024-02-19 14:36:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:01,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270167069] [2024-02-19 14:36:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270167069] [2024-02-19 14:36:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270167069] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518869517] [2024-02-19 14:36:01,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:36:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:01,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:36:01,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:36:01,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:36:01,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:01,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-19 14:36:01,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:02,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:36:02,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518869517] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:02,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:02,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-02-19 14:36:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049484884] [2024-02-19 14:36:02,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:02,761 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:36:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:36:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:36:02,762 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:36:02,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 2669 transitions, 54535 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:02,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:02,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:36:02,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:08,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-19 14:36:12,255 INFO L124 PetriNetUnfolderBase]: 3780/6573 cut-off events. [2024-02-19 14:36:12,255 INFO L125 PetriNetUnfolderBase]: For 762/762 co-relation queries the response was YES. [2024-02-19 14:36:12,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72536 conditions, 6573 events. 3780/6573 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 43415 event pairs, 2 based on Foata normal form. 6/4341 useless extension candidates. Maximal degree in co-relation 66607. Up to 6473 conditions per place. [2024-02-19 14:36:12,319 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2709 selfloop transitions, 339 changer transitions 730/3779 dead transitions. [2024-02-19 14:36:12,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 3779 transitions, 84777 flow [2024-02-19 14:36:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 14:36:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 14:36:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 281 transitions. [2024-02-19 14:36:12,321 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6722488038277512 [2024-02-19 14:36:12,322 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2024-02-19 14:36:12,322 INFO L507 AbstractCegarLoop]: Abstraction has has 111 places, 3779 transitions, 84777 flow [2024-02-19 14:36:12,322 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:12,322 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:12,322 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:12,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-19 14:36:12,536 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:12,536 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -379501402, now seen corresponding path program 3 times [2024-02-19 14:36:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507179952] [2024-02-19 14:36:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:12,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507179952] [2024-02-19 14:36:12,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507179952] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130622670] [2024-02-19 14:36:12,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:36:12,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:12,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:36:12,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 14:36:12,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:36:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:12,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:36:12,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:12,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:12,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130622670] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:12,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:12,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-02-19 14:36:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771440832] [2024-02-19 14:36:12,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:12,900 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-19 14:36:12,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-19 14:36:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-19 14:36:12,901 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:36:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 3779 transitions, 84777 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:36:12,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:18,785 INFO L124 PetriNetUnfolderBase]: 5260/9440 cut-off events. [2024-02-19 14:36:18,785 INFO L125 PetriNetUnfolderBase]: For 1157/1157 co-relation queries the response was YES. [2024-02-19 14:36:18,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113484 conditions, 9440 events. 5260/9440 cut-off events. For 1157/1157 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 70159 event pairs, 2 based on Foata normal form. 0/6324 useless extension candidates. Maximal degree in co-relation 104513. Up to 9291 conditions per place. [2024-02-19 14:36:18,882 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 3331 selfloop transitions, 936 changer transitions 1289/5557 dead transitions. [2024-02-19 14:36:18,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 5557 transitions, 135854 flow [2024-02-19 14:36:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:36:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:36:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2024-02-19 14:36:18,885 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5546558704453441 [2024-02-19 14:36:18,886 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2024-02-19 14:36:18,886 INFO L507 AbstractCegarLoop]: Abstraction has has 123 places, 5557 transitions, 135854 flow [2024-02-19 14:36:18,886 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:18,886 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:18,886 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:18,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-19 14:36:19,104 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:19,105 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:19,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2013074254, now seen corresponding path program 4 times [2024-02-19 14:36:19,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:19,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318259993] [2024-02-19 14:36:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:19,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:19,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:19,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318259993] [2024-02-19 14:36:19,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318259993] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:19,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901595018] [2024-02-19 14:36:19,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:36:19,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:19,181 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) [2024-02-19 14:36:19,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 14:36:19,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:36:19,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:19,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:36:19,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:19,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901595018] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:19,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:19,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-02-19 14:36:19,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948811398] [2024-02-19 14:36:19,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:19,375 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:36:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:36:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:36:19,376 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:36:19,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 5557 transitions, 135854 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:19,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:19,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:36:19,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:30,759 INFO L124 PetriNetUnfolderBase]: 5926/11124 cut-off events. [2024-02-19 14:36:30,759 INFO L125 PetriNetUnfolderBase]: For 1359/1359 co-relation queries the response was YES. [2024-02-19 14:36:30,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144727 conditions, 11124 events. 5926/11124 cut-off events. For 1359/1359 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 89764 event pairs, 2 based on Foata normal form. 0/7526 useless extension candidates. Maximal degree in co-relation 133368. Up to 10956 conditions per place. [2024-02-19 14:36:30,873 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 3703 selfloop transitions, 1302 changer transitions 1714/6720 dead transitions. [2024-02-19 14:36:30,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 6720 transitions, 177816 flow [2024-02-19 14:36:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:36:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:36:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-02-19 14:36:30,874 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5375939849624061 [2024-02-19 14:36:30,875 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2024-02-19 14:36:30,875 INFO L507 AbstractCegarLoop]: Abstraction has has 136 places, 6720 transitions, 177816 flow [2024-02-19 14:36:30,875 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:30,876 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:30,876 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:30,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 14:36:31,088 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,SelfDestructingSolverStorable11 [2024-02-19 14:36:31,089 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:31,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1784363722, now seen corresponding path program 5 times [2024-02-19 14:36:31,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:31,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971702717] [2024-02-19 14:36:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:31,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:31,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971702717] [2024-02-19 14:36:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971702717] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789007508] [2024-02-19 14:36:31,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:36:31,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:31,174 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) [2024-02-19 14:36:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 14:36:31,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:36:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:31,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:36:31,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:31,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789007508] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:31,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:31,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-02-19 14:36:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035865486] [2024-02-19 14:36:31,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:31,400 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-19 14:36:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-19 14:36:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-19 14:36:31,401 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:36:31,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 6720 transitions, 177816 flow. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:31,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:31,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:36:31,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:36:49,324 INFO L124 PetriNetUnfolderBase]: 7151/13224 cut-off events. [2024-02-19 14:36:49,324 INFO L125 PetriNetUnfolderBase]: For 1510/1510 co-relation queries the response was YES. [2024-02-19 14:36:49,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185098 conditions, 13224 events. 7151/13224 cut-off events. For 1510/1510 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 108643 event pairs, 2 based on Foata normal form. 0/8920 useless extension candidates. Maximal degree in co-relation 172177. Up to 13044 conditions per place. [2024-02-19 14:36:49,437 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 4545 selfloop transitions, 1615 changer transitions 1830/7991 dead transitions. [2024-02-19 14:36:49,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 7991 transitions, 227103 flow [2024-02-19 14:36:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:36:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:36:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-02-19 14:36:49,440 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5375939849624061 [2024-02-19 14:36:49,440 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2024-02-19 14:36:49,441 INFO L507 AbstractCegarLoop]: Abstraction has has 149 places, 7991 transitions, 227103 flow [2024-02-19 14:36:49,441 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:49,441 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:36:49,441 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:36:49,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 14:36:49,641 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-19 14:36:49,642 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:36:49,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:36:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash 381858340, now seen corresponding path program 6 times [2024-02-19 14:36:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:36:49,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164479779] [2024-02-19 14:36:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:36:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:36:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:36:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:50,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:36:50,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164479779] [2024-02-19 14:36:50,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164479779] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:36:50,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276349943] [2024-02-19 14:36:50,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:36:50,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:36:50,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:36:50,036 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) [2024-02-19 14:36:50,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 14:36:50,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 14:36:50,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:36:50,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-19 14:36:50,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:36:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:36:50,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:36:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:36:50,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276349943] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:36:50,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:36:50,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-02-19 14:36:50,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090431431] [2024-02-19 14:36:50,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:36:50,970 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:36:50,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:36:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:36:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:36:50,972 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:36:50,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 7991 transitions, 227103 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:36:50,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:36:50,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:36:50,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:37:20,843 INFO L124 PetriNetUnfolderBase]: 8104/14933 cut-off events. [2024-02-19 14:37:20,844 INFO L125 PetriNetUnfolderBase]: For 1688/1688 co-relation queries the response was YES. [2024-02-19 14:37:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223464 conditions, 14933 events. 8104/14933 cut-off events. For 1688/1688 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 124795 event pairs, 2 based on Foata normal form. 11/10036 useless extension candidates. Maximal degree in co-relation 209603. Up to 14718 conditions per place. [2024-02-19 14:37:21,003 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 5175 selfloop transitions, 1913 changer transitions 1932/9021 dead transitions. [2024-02-19 14:37:21,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 9021 transitions, 274313 flow [2024-02-19 14:37:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 14:37:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 14:37:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 241 transitions. [2024-02-19 14:37:21,005 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.551487414187643 [2024-02-19 14:37:21,005 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2024-02-19 14:37:21,006 INFO L507 AbstractCegarLoop]: Abstraction has has 171 places, 9021 transitions, 274313 flow [2024-02-19 14:37:21,006 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:21,006 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:37:21,006 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:37:21,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-19 14:37:21,208 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,SelfDestructingSolverStorable13 [2024-02-19 14:37:21,209 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:37:21,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:37:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1667482166, now seen corresponding path program 7 times [2024-02-19 14:37:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:37:21,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699124973] [2024-02-19 14:37:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:37:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:37:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:37:21,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:37:21,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699124973] [2024-02-19 14:37:21,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699124973] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:37:21,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366976289] [2024-02-19 14:37:21,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:37:21,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:37:21,280 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) [2024-02-19 14:37:21,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 14:37:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:21,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:37:21,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:37:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:37:21,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:37:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:37:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366976289] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:37:21,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:37:21,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-02-19 14:37:21,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926750828] [2024-02-19 14:37:21,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:37:21,496 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:37:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:37:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:37:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:37:21,497 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:37:21,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 9021 transitions, 274313 flow. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:21,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:37:21,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:37:21,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:37:52,369 INFO L124 PetriNetUnfolderBase]: 8620/15861 cut-off events. [2024-02-19 14:37:52,369 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2024-02-19 14:37:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253173 conditions, 15861 events. 8620/15861 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 133750 event pairs, 2 based on Foata normal form. 0/10653 useless extension candidates. Maximal degree in co-relation 238163. Up to 15648 conditions per place. [2024-02-19 14:37:52,505 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 5769 selfloop transitions, 1769 changer transitions 2092/9631 dead transitions. [2024-02-19 14:37:52,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 9631 transitions, 311960 flow [2024-02-19 14:37:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:37:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:37:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 154 transitions. [2024-02-19 14:37:52,506 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2024-02-19 14:37:52,506 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 166 predicate places. [2024-02-19 14:37:52,507 INFO L507 AbstractCegarLoop]: Abstraction has has 186 places, 9631 transitions, 311960 flow [2024-02-19 14:37:52,507 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:52,507 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:37:52,507 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:37:52,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-19 14:37:52,707 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,SelfDestructingSolverStorable14 [2024-02-19 14:37:52,708 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:37:52,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:37:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash 487783632, now seen corresponding path program 8 times [2024-02-19 14:37:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:37:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199532200] [2024-02-19 14:37:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:37:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:37:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:37:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:37:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:37:53,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199532200] [2024-02-19 14:37:53,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199532200] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:37:53,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761016113] [2024-02-19 14:37:53,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:37:53,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:37:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:37:53,038 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) [2024-02-19 14:37:53,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 14:37:53,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:37:53,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:37:53,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-19 14:37:53,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:37:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:37:53,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:37:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:37:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761016113] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:37:53,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:37:53,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-02-19 14:37:53,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455906284] [2024-02-19 14:37:53,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:37:53,893 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:37:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:37:53,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:37:53,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:37:53,894 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:37:53,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 9631 transitions, 311960 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:37:53,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:37:53,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:37:53,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:38:44,635 INFO L124 PetriNetUnfolderBase]: 10528/19303 cut-off events. [2024-02-19 14:38:44,635 INFO L125 PetriNetUnfolderBase]: For 2006/2006 co-relation queries the response was YES. [2024-02-19 14:38:44,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327075 conditions, 19303 events. 10528/19303 cut-off events. For 2006/2006 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 167632 event pairs, 2 based on Foata normal form. 24/12949 useless extension candidates. Maximal degree in co-relation 307960. Up to 19052 conditions per place. [2024-02-19 14:38:44,818 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 6594 selfloop transitions, 2701 changer transitions 2410/11706 dead transitions. [2024-02-19 14:38:44,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 11706 transitions, 402529 flow [2024-02-19 14:38:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-19 14:38:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-19 14:38:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 278 transitions. [2024-02-19 14:38:44,820 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5419103313840156 [2024-02-19 14:38:44,821 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2024-02-19 14:38:44,821 INFO L507 AbstractCegarLoop]: Abstraction has has 212 places, 11706 transitions, 402529 flow [2024-02-19 14:38:44,821 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:44,821 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:38:44,821 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:38:44,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-02-19 14:38:45,022 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,SelfDestructingSolverStorable15 [2024-02-19 14:38:45,022 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:38:45,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:38:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash 377339758, now seen corresponding path program 9 times [2024-02-19 14:38:45,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:38:45,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42418494] [2024-02-19 14:38:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:38:45,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:38:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:38:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:38:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:38:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42418494] [2024-02-19 14:38:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42418494] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:38:45,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93100602] [2024-02-19 14:38:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:38:45,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:38:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:38:45,332 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) [2024-02-19 14:38:45,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 14:38:45,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:38:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:38:45,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-19 14:38:45,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:38:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:38:45,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:38:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:38:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93100602] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:38:46,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:38:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-02-19 14:38:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107726918] [2024-02-19 14:38:46,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:38:46,128 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 14:38:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:38:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 14:38:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-02-19 14:38:46,129 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:38:46,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 11706 transitions, 402529 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:38:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:38:46,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:38:46,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:40:00,273 INFO L124 PetriNetUnfolderBase]: 12340/22544 cut-off events. [2024-02-19 14:40:00,273 INFO L125 PetriNetUnfolderBase]: For 2289/2289 co-relation queries the response was YES. [2024-02-19 14:40:00,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404362 conditions, 22544 events. 12340/22544 cut-off events. For 2289/2289 co-relation queries the response was YES. Maximal size of possible extension queue 1571. Compared 200630 event pairs, 2 based on Foata normal form. 16/15046 useless extension candidates. Maximal degree in co-relation 382027. Up to 22269 conditions per place. [2024-02-19 14:40:00,509 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 7784 selfloop transitions, 3111 changer transitions 2787/13683 dead transitions. [2024-02-19 14:40:00,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 13683 transitions, 497774 flow [2024-02-19 14:40:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-19 14:40:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-19 14:40:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 267 transitions. [2024-02-19 14:40:00,510 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.52046783625731 [2024-02-19 14:40:00,511 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 218 predicate places. [2024-02-19 14:40:00,511 INFO L507 AbstractCegarLoop]: Abstraction has has 238 places, 13683 transitions, 497774 flow [2024-02-19 14:40:00,511 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:40:00,511 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:40:00,511 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:40:00,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-19 14:40:00,715 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,SelfDestructingSolverStorable16 [2024-02-19 14:40:00,715 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:40:00,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:40:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1028733347, now seen corresponding path program 10 times [2024-02-19 14:40:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:40:00,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561429201] [2024-02-19 14:40:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:40:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:40:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:40:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:40:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:40:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561429201] [2024-02-19 14:40:00,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561429201] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:40:00,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740744356] [2024-02-19 14:40:00,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:40:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:40:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:40:00,774 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) [2024-02-19 14:40:00,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 14:40:00,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:40:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:40:00,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 14:40:00,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:40:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:40:00,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:40:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:40:00,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740744356] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:40:00,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:40:00,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-02-19 14:40:00,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005337775] [2024-02-19 14:40:00,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:40:00,923 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 14:40:00,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:40:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 14:40:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-19 14:40:00,924 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:40:00,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 13683 transitions, 497774 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:40:00,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:40:00,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:40:00,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:41:17,411 INFO L124 PetriNetUnfolderBase]: 9309/17001 cut-off events. [2024-02-19 14:41:17,411 INFO L125 PetriNetUnfolderBase]: For 1478/1478 co-relation queries the response was YES. [2024-02-19 14:41:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321548 conditions, 17001 events. 9309/17001 cut-off events. For 1478/1478 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 146199 event pairs, 2 based on Foata normal form. 0/11827 useless extension candidates. Maximal degree in co-relation 306599. Up to 16771 conditions per place. [2024-02-19 14:41:17,582 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 7349 selfloop transitions, 1230 changer transitions 1748/10328 dead transitions. [2024-02-19 14:41:17,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 10328 transitions, 395761 flow [2024-02-19 14:41:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:41:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:41:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-02-19 14:41:17,583 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-02-19 14:41:17,583 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2024-02-19 14:41:17,584 INFO L507 AbstractCegarLoop]: Abstraction has has 237 places, 10328 transitions, 395761 flow [2024-02-19 14:41:17,584 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:41:17,584 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:41:17,584 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:41:17,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-19 14:41:17,784 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:41:17,785 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:41:17,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:41:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash 133779593, now seen corresponding path program 11 times [2024-02-19 14:41:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:41:17,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977568886] [2024-02-19 14:41:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:41:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:41:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:41:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:41:17,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:41:17,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977568886] [2024-02-19 14:41:17,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977568886] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:41:17,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381980423] [2024-02-19 14:41:17,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:41:17,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:41:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:41:17,856 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) [2024-02-19 14:41:17,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-19 14:41:17,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-19 14:41:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:41:17,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:41:17,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:41:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:41:18,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:41:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:41:18,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381980423] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:41:18,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:41:18,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-02-19 14:41:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430458246] [2024-02-19 14:41:18,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:41:18,103 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-19 14:41:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:41:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-19 14:41:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-19 14:41:18,103 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:41:18,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 10328 transitions, 395761 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:41:18,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:41:18,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:41:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:42:14,366 INFO L124 PetriNetUnfolderBase]: 9973/18196 cut-off events. [2024-02-19 14:42:14,366 INFO L125 PetriNetUnfolderBase]: For 1603/1603 co-relation queries the response was YES. [2024-02-19 14:42:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362057 conditions, 18196 events. 9973/18196 cut-off events. For 1603/1603 co-relation queries the response was YES. Maximal size of possible extension queue 1248. Compared 156671 event pairs, 2 based on Foata normal form. 0/13328 useless extension candidates. Maximal degree in co-relation 346565. Up to 17949 conditions per place. [2024-02-19 14:42:14,577 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 8509 selfloop transitions, 919 changer transitions 1555/10984 dead transitions. [2024-02-19 14:42:14,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 10984 transitions, 442886 flow [2024-02-19 14:42:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:42:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:42:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 149 transitions. [2024-02-19 14:42:14,579 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6032388663967612 [2024-02-19 14:42:14,580 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2024-02-19 14:42:14,580 INFO L507 AbstractCegarLoop]: Abstraction has has 249 places, 10984 transitions, 442886 flow [2024-02-19 14:42:14,580 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:42:14,580 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:42:14,580 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:42:14,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-19 14:42:14,783 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:42:14,784 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:42:14,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:42:14,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2104633673, now seen corresponding path program 12 times [2024-02-19 14:42:14,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:42:14,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147277201] [2024-02-19 14:42:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:42:14,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:42:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:42:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:42:14,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:42:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147277201] [2024-02-19 14:42:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147277201] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:42:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664368546] [2024-02-19 14:42:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:42:14,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:42:14,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:42:14,844 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) [2024-02-19 14:42:14,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-19 14:42:14,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-19 14:42:14,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:42:14,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:42:14,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:42:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:42:15,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:42:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:42:15,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664368546] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:42:15,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:42:15,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-02-19 14:42:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695456584] [2024-02-19 14:42:15,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:42:15,046 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:42:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:42:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:42:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:42:15,047 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:42:15,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 10984 transitions, 442886 flow. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:42:15,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:42:15,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:42:15,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:43:16,363 INFO L124 PetriNetUnfolderBase]: 9793/17716 cut-off events. [2024-02-19 14:43:16,363 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2024-02-19 14:43:16,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370122 conditions, 17716 events. 9793/17716 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 150430 event pairs, 2 based on Foata normal form. 0/13034 useless extension candidates. Maximal degree in co-relation 354679. Up to 17477 conditions per place. [2024-02-19 14:43:16,549 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 8048 selfloop transitions, 1119 changer transitions 1480/10648 dead transitions. [2024-02-19 14:43:16,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 10648 transitions, 450596 flow [2024-02-19 14:43:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:43:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:43:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 149 transitions. [2024-02-19 14:43:16,550 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4901315789473684 [2024-02-19 14:43:16,551 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 244 predicate places. [2024-02-19 14:43:16,551 INFO L507 AbstractCegarLoop]: Abstraction has has 264 places, 10648 transitions, 450596 flow [2024-02-19 14:43:16,551 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:43:16,551 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:43:16,551 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:43:16,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-19 14:43:16,768 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:43:16,768 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:43:16,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:43:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 829792043, now seen corresponding path program 13 times [2024-02-19 14:43:16,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:43:16,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993283174] [2024-02-19 14:43:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:43:16,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:43:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:43:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:43:16,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:43:16,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993283174] [2024-02-19 14:43:16,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993283174] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:43:16,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969327663] [2024-02-19 14:43:16,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:43:16,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:43:16,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:43:16,846 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) [2024-02-19 14:43:16,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-19 14:43:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:43:16,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:43:16,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:43:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:43:17,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:43:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:43:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969327663] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:43:17,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:43:17,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-02-19 14:43:17,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064827216] [2024-02-19 14:43:17,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:43:17,050 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-19 14:43:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:43:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-19 14:43:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-19 14:43:17,050 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:43:17,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 10648 transitions, 450596 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:43:17,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:43:17,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:43:17,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:44:28,816 INFO L124 PetriNetUnfolderBase]: 10489/19085 cut-off events. [2024-02-19 14:44:28,816 INFO L125 PetriNetUnfolderBase]: For 1707/1707 co-relation queries the response was YES. [2024-02-19 14:44:28,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417682 conditions, 19085 events. 10489/19085 cut-off events. For 1707/1707 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 165191 event pairs, 2 based on Foata normal form. 0/14147 useless extension candidates. Maximal degree in co-relation 400336. Up to 18835 conditions per place. [2024-02-19 14:44:29,053 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 7705 selfloop transitions, 1807 changer transitions 1977/11490 dead transitions. [2024-02-19 14:44:29,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 11490 transitions, 509274 flow [2024-02-19 14:44:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-19 14:44:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-19 14:44:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 130 transitions. [2024-02-19 14:44:29,055 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-02-19 14:44:29,056 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2024-02-19 14:44:29,056 INFO L507 AbstractCegarLoop]: Abstraction has has 276 places, 11490 transitions, 509274 flow [2024-02-19 14:44:29,056 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:44:29,056 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:44:29,056 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:44:29,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-19 14:44:29,270 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:44:29,271 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:44:29,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:44:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1674854606, now seen corresponding path program 14 times [2024-02-19 14:44:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:44:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369474745] [2024-02-19 14:44:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:44:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:44:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:44:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:44:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:44:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369474745] [2024-02-19 14:44:29,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369474745] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:44:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870746226] [2024-02-19 14:44:29,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:44:29,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:44:29,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:44:29,720 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) [2024-02-19 14:44:29,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-19 14:44:29,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:44:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:44:29,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-19 14:44:29,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:44:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:44:30,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:44:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:44:30,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870746226] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:44:30,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:44:30,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 22 [2024-02-19 14:44:30,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150104410] [2024-02-19 14:44:30,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:44:30,903 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 14:44:30,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:44:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 14:44:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-02-19 14:44:30,904 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:44:30,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 11490 transitions, 509274 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:44:30,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:44:30,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:44:30,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:57,166 INFO L124 PetriNetUnfolderBase]: 11772/21288 cut-off events. [2024-02-19 14:45:57,166 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2024-02-19 14:45:57,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487061 conditions, 21288 events. 11772/21288 cut-off events. For 1916/1916 co-relation queries the response was YES. Maximal size of possible extension queue 1435. Compared 185759 event pairs, 2 based on Foata normal form. 11/15811 useless extension candidates. Maximal degree in co-relation 466212. Up to 21022 conditions per place. [2024-02-19 14:45:57,433 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 8180 selfloop transitions, 2466 changer transitions 2139/12786 dead transitions. [2024-02-19 14:45:57,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 12786 transitions, 592255 flow [2024-02-19 14:45:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-19 14:45:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-19 14:45:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 379 transitions. [2024-02-19 14:45:57,435 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5114709851551957 [2024-02-19 14:45:57,435 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 294 predicate places. [2024-02-19 14:45:57,435 INFO L507 AbstractCegarLoop]: Abstraction has has 314 places, 12786 transitions, 592255 flow [2024-02-19 14:45:57,436 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:57,436 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:57,436 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:57,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-19 14:45:57,640 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:57,641 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:45:57,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1963177237, now seen corresponding path program 15 times [2024-02-19 14:45:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134391959] [2024-02-19 14:45:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:57,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:45:57,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:57,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134391959] [2024-02-19 14:45:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134391959] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:57,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062108965] [2024-02-19 14:45:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:45:57,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:57,707 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) [2024-02-19 14:45:57,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-19 14:45:57,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-02-19 14:45:57,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:45:57,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-19 14:45:57,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:57,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:45:57,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062108965] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:45:57,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:45:57,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-02-19 14:45:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677028278] [2024-02-19 14:45:57,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:45:57,929 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:45:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:45:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:45:57,930 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:45:57,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 12786 transitions, 592255 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:57,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:57,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:45:57,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:47:41,725 INFO L124 PetriNetUnfolderBase]: 11328/20409 cut-off events. [2024-02-19 14:47:41,725 INFO L125 PetriNetUnfolderBase]: For 1859/1859 co-relation queries the response was YES. [2024-02-19 14:47:41,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487430 conditions, 20409 events. 11328/20409 cut-off events. For 1859/1859 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 175836 event pairs, 2 based on Foata normal form. 0/15415 useless extension candidates. Maximal degree in co-relation 467231. Up to 20161 conditions per place. [2024-02-19 14:47:42,003 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 8525 selfloop transitions, 1747 changer transitions 1942/12215 dead transitions. [2024-02-19 14:47:42,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 12215 transitions, 590252 flow [2024-02-19 14:47:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:47:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:47:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-02-19 14:47:42,005 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5980861244019139 [2024-02-19 14:47:42,005 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 304 predicate places. [2024-02-19 14:47:42,005 INFO L507 AbstractCegarLoop]: Abstraction has has 324 places, 12215 transitions, 590252 flow [2024-02-19 14:47:42,006 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:47:42,006 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:47:42,006 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:47:42,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-19 14:47:42,223 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:47:42,224 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:47:42,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:47:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash -238834003, now seen corresponding path program 16 times [2024-02-19 14:47:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:47:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175200207] [2024-02-19 14:47:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:47:42,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:47:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:47:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:47:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:47:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175200207] [2024-02-19 14:47:42,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175200207] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:47:42,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:47:42,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:47:42,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453871887] [2024-02-19 14:47:42,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:47:42,285 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:47:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:47:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:47:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:47:42,289 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:47:42,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 12215 transitions, 590252 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:47:42,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:47:42,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:47:42,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:48:31,841 INFO L124 PetriNetUnfolderBase]: 5612/10602 cut-off events. [2024-02-19 14:48:31,841 INFO L125 PetriNetUnfolderBase]: For 1036/1036 co-relation queries the response was YES. [2024-02-19 14:48:31,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264163 conditions, 10602 events. 5612/10602 cut-off events. For 1036/1036 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 86613 event pairs, 2 based on Foata normal form. 0/8144 useless extension candidates. Maximal degree in co-relation 251852. Up to 10448 conditions per place. [2024-02-19 14:48:31,945 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 3398 selfloop transitions, 486 changer transitions 2564/6449 dead transitions. [2024-02-19 14:48:31,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 6449 transitions, 324661 flow [2024-02-19 14:48:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:48:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:48:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-02-19 14:48:31,946 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-02-19 14:48:31,947 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 296 predicate places. [2024-02-19 14:48:31,947 INFO L507 AbstractCegarLoop]: Abstraction has has 316 places, 6449 transitions, 324661 flow [2024-02-19 14:48:31,947 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:48:31,947 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:48:31,948 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:48:31,948 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-19 14:48:31,948 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:48:31,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:48:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash 957892905, now seen corresponding path program 4 times [2024-02-19 14:48:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:48:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440631787] [2024-02-19 14:48:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:48:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:48:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:48:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:48:32,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:48:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440631787] [2024-02-19 14:48:32,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440631787] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:48:32,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241995276] [2024-02-19 14:48:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:48:32,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:48:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:48:32,027 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) [2024-02-19 14:48:32,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-19 14:48:32,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:48:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:48:32,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:48:32,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:48:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:48:32,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:48:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:48:32,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241995276] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:48:32,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:48:32,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2024-02-19 14:48:32,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907498621] [2024-02-19 14:48:32,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:48:32,239 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 14:48:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:48:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 14:48:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:48:32,240 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:48:32,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 6449 transitions, 324661 flow. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:48:32,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:48:32,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:48:32,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:49:02,983 INFO L124 PetriNetUnfolderBase]: 7264/13864 cut-off events. [2024-02-19 14:49:02,983 INFO L125 PetriNetUnfolderBase]: For 1401/1401 co-relation queries the response was YES. [2024-02-19 14:49:02,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359028 conditions, 13864 events. 7264/13864 cut-off events. For 1401/1401 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 118317 event pairs, 2 based on Foata normal form. 0/10608 useless extension candidates. Maximal degree in co-relation 343136. Up to 13682 conditions per place. [2024-02-19 14:49:03,136 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 3952 selfloop transitions, 1043 changer transitions 3464/8460 dead transitions. [2024-02-19 14:49:03,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 8460 transitions, 442792 flow [2024-02-19 14:49:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 14:49:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 14:49:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 235 transitions. [2024-02-19 14:49:03,145 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5377574370709383 [2024-02-19 14:49:03,145 INFO L308 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2024-02-19 14:49:03,146 INFO L507 AbstractCegarLoop]: Abstraction has has 338 places, 8460 transitions, 442792 flow [2024-02-19 14:49:03,146 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:49:03,146 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:49:03,146 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:49:03,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-19 14:49:03,346 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,SelfDestructingSolverStorable24 [2024-02-19 14:49:03,347 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:49:03,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:49:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1026803473, now seen corresponding path program 5 times [2024-02-19 14:49:03,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:49:03,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721099214] [2024-02-19 14:49:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:49:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:49:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:49:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:49:03,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:49:03,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721099214] [2024-02-19 14:49:03,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721099214] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:49:03,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215887232] [2024-02-19 14:49:03,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:49:03,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:49:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:49:03,424 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) [2024-02-19 14:49:03,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-19 14:49:03,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:49:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:49:03,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:49:03,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:49:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:49:03,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:49:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:49:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215887232] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:49:03,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:49:03,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2024-02-19 14:49:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686495011] [2024-02-19 14:49:03,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:49:03,673 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 14:49:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:49:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 14:49:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:49:03,673 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-02-19 14:49:03,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 8460 transitions, 442792 flow. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:49:03,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:49:03,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-02-19 14:49:03,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15